What is the equivalent factored form of 12x4 – 42x3 – 90x2? 6x(x – 5)(2x 3) 6x2(x – 5)(2x 3) 6x(x 5)(2x – 3) 6x2(x 5)(2x – 3).

According to the question the slope of the line parallel to the line containing side WV is -1.

To find the slope of the line parallel to the line containing side WV, we need to determine the slope of side WV.

Sure! Here are the coordinates of points [tex]T, U, V, and[/tex] [tex]W[/tex] properly aligned:

[tex]\[T &: (a, b) \\U &: (a + 2, b + 2) \\V &: (a + 5, b - 1) \\W &: (a + 3, b - 3) \\\][/tex]

To find the slope of the line parallel to the line containing side WV, we can calculate the slope between points W and V using the slope formula:

[tex]\[ \text{Slope} = \frac{{\text{change in } y}}{{\text{change in } x}} \][/tex]

Substituting the coordinates of points W and V into the formula:

[tex]\[ \text{Slope} = \frac{{(b - 1) - (b - 3)}}{{(a + 5) - (a + 3)}} \][/tex]

Simplifying the expression:

[tex]\[ \text{Slope} = \frac{{-2}}{{2}} \][/tex]

Therefore, the slope of the line parallel to the line containing side WV is -1.

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a) Sabrina can type 2 ⅖ pages per hour. To find out how many pages she can type in 8 hours and 20 minutes, we need to convert the time to hours.

b) To convert 8 hours and 20 minutes to hours, we divide the minutes by 60 and add the result to the number of hours. Then, we multiply the total number of hours by Sabrina's typing rate of 2 ⅖ pages per hour to find the total number of pages she can type.

a) Sabrina's typing rate is given as 2 ⅖ pages per hour. This means she can type 2 and two-fifths of a page in one hour.

b) To calculate the total number of pages Sabrina can type in 8 hours and 20 minutes, we convert the time to hours. Since there are 60 minutes in an hour, we divide the minutes by 60 to convert them to hours. In this case, 20 minutes divided by 60 equals 1/3 hours. Adding this to the 8 hours gives us a total of 8 and 1/3 hours.

Next, we multiply the total number of hours (8 1/3) by Sabrina's typing rate (2 ⅖ pages per hour). To multiply fractions, we multiply the numerators and denominators separately. The result is (25/3) * (12/5) = 300/15 = 20 pages.

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The factors of x^2 - 64 are (x - 8)(x + 8) because it follows the difference of squares formula, giving the correct factorization that yields x^2 - 64 when multiplied.

To factorize x^2 - 64, we can use the difference of squares formula, which states that a^2 - b^2 can be factored as (a - b)(a + b). In this case, a = x and b = 8. Applying the formula, we have (x - 8)(x + 8) as the factors of x^2 - 64. This is the correct factorization because when we multiply these factors, we get (x - 8)(x + 8) = x^2 - 64.

The other options provided (x - 4)(x + 16) and (x - 8)(x - 8) are not valid factorizations of x^2 - 64. The first option, (x - 4)(x + 16), does not yield x^2 - 64 when multiplied. The second option, (x - 8)(x - 8), is a repeated factor and does not represent the correct factorization. Therefore, the factors of x^2 - 64 are (x - 8)(x + 8).

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The rectangular prism has a total surface area of 720 square centimeters, and the ratio of the sides XY, XZ, and YZ is 5:3:4. The task is to determine the length of side XY.

The surface area of a rectangular prism can be calculated by adding the areas of all its rectangular faces. In this case, the total surface area is given as 720 square centimeters.

To find the length of side XY, we need to determine the corresponding ratio value. The given ratio of XY:XZ:YZ is 5:3:4. Since XY is the first term in the ratio, its length can be calculated as follows:

Length of XY = (5 / (5 + 3 + 4)) * Total surface area

Substituting the values into the formula, we get:

Length of XY = (5 / 12) * 720

Evaluating this expression will give us the length of XY.

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To determine the expression that represents the volume of the prism, we need to consider the dimensions given for the prism.

Unfortunately, the dimensions of the prism are not explicitly provided in the question, so it is difficult to determine the correct expression with certainty. However, I will explain how to calculate the volume of a prism based on the given expressions.

In general, the volume of a rectangular prism can be calculated by multiplying the length, width, and height of the prism. The volume formula for a rectangular prism is V = length × width × height.

Let's analyze the given expressions one by one:

10 × 4 units³: This expression represents the product of two values, which could potentially represent the length and width of the prism. However, since we are looking for the volume, we need to multiply the length, width, and height together, not just two of the dimensions.

7 × 7 units³: This expression represents the product of two identical values, which could potentially represent the length and width of the prism. However, again, we need to multiply all three dimensions together to calculate the volume.

3 × 11 units³: This expression represents the product of two values, which could potentially represent the length and width of the prism. However, we still need the height dimension to calculate the volume.

21 × 4 units³: This expression represents the product of two values, which could potentially represent the length and width of the prism. Again, we are missing the height dimension.

Based on the information provided, none of the given expressions represent the volume of the prism accurately, as they only include two out of the three necessary dimensions. Without the complete dimensions of the prism, we cannot determine the correct expression for the volume.

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The independent variable in the equation a=15−(b+6) is b. If the architect wants b to be 3, it means that the distance between the floor and the bottom of the window is 3 feet, and for this to work, a must be 6 feet. The customer wants 5 feet of space above the window, which means that b must be 4 feet.

Part A:

The independent variable is the variable that can be freely chosen or varied. In the given equation a=15−(b+6), the independent variable is b because we can choose any value of b and then calculate the corresponding value of a using the equation.

Part B:

If the architect wants b to be 3, this means that the distance between the floor and the bottom of the window is 3 feet.

This would work if a is 6 feet, because:

a = 15 - (b + 6)

a = 15 - (3 + 6)

a = 6

Therefore, if b is 3, then a must be 6 for the relationship described by the equation to hold.

Part C:

The customer wants the window to have 5 feet of space above it. This means that the distance between the top of the window and the ceiling is 5 feet. According to the equation, we know that:

a = 15 - (b + 6)

So we can substitute the value of a as 5 and solve for b:

5 = 15 - (b + 6)

5 = 9 - b

b = 4

Therefore, the value of b is 4 feet when the customer wants the window to have 5 feet of space above it.

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One sample t-test, as it compares the mean birthweight of the mothers in the program to a known population mean.

We have,

The most appropriate hypothesis test for this study would be a

one-sample t-test.

A one-sample t-test is suitable when we want to compare the mean of a single sample to a known population mean or hypothesized value.

In this case, the study aims to test the effectiveness of a new prenatal care program in increasing the birth weight of babies born into poverty.

The researchers would compare the mean birthweight of the 30 mothers who participated in the program to the known population mean birthweight for babies born to mothers living in poverty, which is approximately 2800 grams.

Since the population standard deviation is not given, the t-test is preferred over the z-test, which requires knowledge of the population standard deviation.

The t-test allows for estimating the population standard deviation based on the sample data.

Additionally, the study involves comparing a single sample (30 mothers) to a known population mean, rather than comparing two related samples, making the paired-sample t-test inappropriate for this scenario.

Thus,

The most appropriate hypothesis test for this study would be a

one-sample t-test.

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La velocidad del recorrido es de 1.67 m/s. Para encontrar la velocidad de un recorrido de 125 m realizado en un tiempo de 75 segundos.

Utilizaremos la fórmula de velocidad promedio, que es la distancia dividida por el tiempo.

Para encontrar la velocidad, sigue estos pasos:

Identifica la distancia recorrida, que es de 125 m.

Identifica el tiempo transcurrido, que es de 75 segundos.

Aplica la fórmula de velocidad promedio: velocidad = distancia / tiempo.

Sustituye los valores conocidos en la fórmula: velocidad = 125 m / 75 s.

Realiza la división: velocidad = 1.67 m/s.

Por lo tanto, la velocidad del recorrido es de 1.67 m/s.

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By using a graphing calculator and a system of equations, we can determine the value of x and then calculate the lengths of the sides. Substituting the value of x into the dimensions, we can identify the longest side among the three.

Using a graphing calculator, enter the equation 2x^3 + 14x^2 + 12x - 400 = 0 and graph it. Find the x-values where the graph intersects the x-axis, which represent the solutions. Using the calculator's "zero" or "intersect" function, determine the numerical values of x. Substitute these values into the dimensions (x, 2x, and x/6) to find the lengths of the sides. Compare the lengths and identify the longest side. This process allows us to find the length of the longest side using a graphing calculator and a system of equations.

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Selena's tree is 6.6 centimeters taller than Julian's tree. This is equivalent to 2.64 inches.

To find out how many inches taller Selena's tree is than Julian's tree, we need to first calculate the difference in height between the two trees in centimeters. We do this by subtracting Julian's tree's height from Selena's tree's height:54.2 cm - 47.6 cm = 6.6 cm.

Next, we convert this difference to inches. We know that 1 cm is approximately equal to 0.4 inches. So, to convert centimeters to inches, we need to multiply by 0.4:6.6 cm × 0.4 in/cm = 2.64 in. Therefore, Selena's tree is 6.6 centimeters taller than Julian's tree, which is equivalent to 2.64 inches.

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The digits 2, 27, and 15 in the time 2;27;15 represent different units of measurement in the race.

In the context of a running race, the first digit 2 represents the number of hours it took the runner to finish the race. This means that the runner completed the race in 2 hours.

The second digit 27 represents the number of minutes it took the runner to finish the race after the hours. In this case, the runner completed the race in 27 minutes.

The third digit 15 represents the number of seconds it took the runner to finish the race after the minutes. Therefore, the runner completed the race in 15 seconds.

By breaking down the total time into hours, minutes, and seconds, the digits provide a detailed representation of the runner's finishing time, allowing for a more precise measurement and comparison of race performances.

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The overall probability can be calculated as P(exactly three spins) = (1 - P(blue)) × (1 - P(blue)) × P(blue).

To determine the probability of spinning the wheel exactly three times until the pointer stops on blue, we need to understand the given conditions and calculate the likelihood of this specific outcome.

Assuming the wheel has multiple colors and the pointer stops on one color each time, we'll focus on the probability of stopping on blue after spinning the wheel three times.

Let's consider the possible outcomes for each spin. Assuming each spin is independent and the probability of stopping on blue is constant, the probability of stopping on blue for a single spin is denoted as P(blue).

To calculate the probability of spinning the wheel exactly three times until stopping on blue, we multiply the probabilities of not stopping on blue for the first two spins and then stopping on blue on the third spin. Since the spins are independent, we multiply the probabilities together.

The probability of not stopping on blue for the first two spins is given by (1 - P(blue)) × (1 - P(blue)). The probability of stopping on blue on the third spin is simply P(blue).

Thus, the overall probability can be calculated as:

P(exactly three spins) = (1 - P(blue)) × (1 - P(blue)) × P(blue).

Without knowing the specific alue of P(blue), we cannot provide an exact numerical probability. However, if the probability of stopping on blue for a single spin is known, it can be substituted into the formula above to calculate the probability of spinning the wheel exactly three times until stopping on blue.

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The property that justifies Emily's first step include the following: C. division property of equality.

In Mathematics and Geometry, the Commutative Property of Addition states that when two (2) or three (3) numerical values (numbers) are added together, the output (end result) would always remain the same, irrespective of the way in which the numerical values are arranged.

Generally speaking, the Commutative Property of Addition allows the addends to be re-ordered without causing a change in the result, output, or outcome.

By applying the division property of equality to Emily's equation, we have the following;

2(-3x² + 2) + 4 = 18x² - 20

2(-3x² + 2) + 2(2) = 2(9x² - 10)

(-3x² + 2) + 2 = (9x² - 10) ⇒ (division property of equality)

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Therefore, Clausen has 32 cards.The correct answer is Clausen has 32 cards.

Juan and Clausen are playing a card game called "Magic." The number of cards they have is in a ratio of Juan: Clausen = 7:4. Juan has 56 cards. To find the number of cards Clausen has, we can use the concept of ratios and proportions.Since the ratio of Juan's cards to Clausen's cards is 7:4, we can say that Juan has 7x cards, where x is a constant.

Similarly, Clausen has 4x cards.Now, we know that Juan has 56 cards. We can use this information to find the value of x.7x = 56

Dividing both sides by 7, we get:

x = 8

Now that we know the value of x, we can find the number of cards Clausen has.4x = 4(8) = 32

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The approximate population density of Asia is 83.03 people per square kilometer.

Population density is the measure of the number of people per unit area, usually per square kilometer. It is calculated by dividing the population of a region by the area of that region. It is important because it gives us an idea of how crowded or sparse a region is.

To find the population density of Asia, we need to divide the population by the area of the continent. Given,The area of Asia = 4.46 × 107 km²The population of Asia = 3.70 × 109 peopleWe can use the formula,Population density = Population/Area= (3.70 × 109 )/(4.46 × 107)≈ 83.03 people per square kilometer

Therefore, the approximate population density of Asia is 83.03 people per square kilometer.

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triangle ABC with angle A and AC missing, we need to solve for the missing parts of the triangle.

Step-by-step explanation:We are given triangle ABC, with angle A and side AC missing. To solve for the missing parts of the triangle, we can use the properties of triangles and trigonometry.Let's start by finding angle A. We know that the sum of angles in a triangle is 180°.

Therefore, we can write:∠A + ∠B + ∠C = 180°

Substituting the values we know, we get:∠A + 60° + 45° = 180°

Simplifying the equation, we get:∠A = 180° - 60° - 45°∠A = 75°

Therefore, angle A measures 75°.Now, we can use trigonometry to find the length of side AC. Since we know the length of sides AB and BC, we can use the Law of Cosines to find the length of AC.

The Law of Cosines states that: c² = a² + b² - 2ab cos(C)

where a, b, and c are the lengths of sides of a triangle, and C is the angle opposite to side c.

Substituting the values we know, we get:AC² = AB² + BC² - 2(AB)(BC) cos(A

)AC² = 6² + 8² - 2(6)(8) cos(75°)

AC² = 36 + 64 - 96 cos(75°)

AC² = 100 - 96 cos(75°)

Using a calculator, we can find that cos(75°) = 0.2588. Substituting this value, we get:AC² = 100 - 96(0.2588)AC² = 100 - 24.8448AC² = 75.1552

Taking the square root of both sides, we get:AC ≈ 8.67

Therefore, side AC has a length of approximately 8.67 units.

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The equation that best models the data in the scatter plot is option D: y = x - 1.

In the given scatter plot, the data points appear to form a straight line that slopes upwards from left to right. The equation y = x - 1 represents a linear function with a slope of 1 and a y-intercept of -1. This means that for every unit increase in x, y increases by the same amount (1), and when x is 0, y is -1.

Option A, y = -x + 1, has a negative slope and would result in a line that slopes downwards from left to right, which does not match the data in the scatter plot.

Option B, y = -x - 1, also has a negative slope and a different y-intercept, which does not align with the data in the scatter plot.

Option C, y = x + 1, has a positive slope but a different y-intercept, which does not accurately represent the data points in the scatter plot.

Therefore, option D, y = x - 1, is the equation that best models the data in the scatter plot, based on the observed trend and the characteristics of the given options.

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Given table, b is the output and a is the input. If we take a look at the table, we can see that b increases by 1 when a increases by 1. So, a linear pattern exists in this table.

The answer is Yes.

The other equations do not have a constant rate of change. For instance, the equation b = a - 5 decreases by 5 when a increases by 1, but in the table, b increases by 1 when a increases by 1. Similarly, the equations a = b - 5 and b = a + 1234 have no correlation to the table. Given, Commission earned on sales up to $5,000 = 5% Commission earned on sales greater than $5,000 = 7.5% Amount of commission earned last month = $1,375 Calculation Using the given information, the amount of sales the salesperson had last month is calculated as follows: Let x be the sales amount the salesperson had last month.

So, the commission earned on the first $5,000 of sales is:$5,000 × 5% = $250 Commission earned on sales greater than $5,000 is: $1,375 − $250 = $1,125 So, we can write that: $1,125 = 7.5% × (x − $5,000)

⇒ x − $5,000

= $15,000 ⇒

x = $20,000 Therefore, the salesperson had $20,000 in sales last month. Given table, b is the output and a is the input. If we take a look at the table, we can see that b increases by 1 when a increases by 1. So, a linear pattern exists in this table. That means the correct equation would have a constant rate of change.

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The three integers are 10, 12 and 14.

To find three integers that satisfy the given conditions, we can use the properties of range and mean.

Let's assume the three integers are x, y, and z.

Range is the difference between the largest and smallest values. In this case, the range is given as 7. Therefore, we can set up the equation:

max(x, y, z) - min(x, y, z) = 7.

Mean is the average of the values. The mean is given as 12. Therefore, we can set up the equation:

(x + y + z) / 3 = 12.

We also know that all three integers are less than 20.

Let's solve these equations simultaneously:

From the equation for the mean, we can rewrite it as:

x + y + z = 36.

Now, let's list all the possible combinations of three integers that satisfy the given conditions:

x = 9, y = 12, z = 15

x = 10, y = 12, z = 14

x = 11, y = 12, z = 13

Out of these combinations, only the second one satisfies the condition that all three integers are less than 20.

Therefore, the three integers that meet the given conditions are:

x = 10, y = 12, z = 14.

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The problem states that there are 125 Grade 8 learners and that they jog and cycle in the ratio of 3:2. So we will take the total ratio of joggers and cyclers as 3 + 2 = 5.

In order to find out how many learners participate in each sport, we must first find the ratio of joggers to cyclers. We can do that by setting up a proportion:3/5 = joggers/1252/5 = cyclers/125Now we can solve for joggers and cyclers by cross multiplying:3/5 * 125 = joggers75 = joggers2/5 * 125 = cyclers50 = cyclersSo, there are 75 Grade 8 learners who jog and 50 Grade 8 learners who cycle. More than 250 learners will be participating in the activity.

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Given information:

Max invest $1000 in a savings account that earns simple 3% interest.

Let's suppose the duration he needs to keep his money in the savings account is t years.

The interest rate is given as 3% in decimal form = 0.03

Max invests $1000 on the savings account that earns 3% simple interest.

This implies that the interest he will earn after t years is given by:

Interest (I) = Principal × Rate × Time

I = 1000 × 0.03 × t

I = 30t

From the problem, he wants to earn $150 in interest.

So, 30t = 150

Solving for t:

$$\begin{aligned}30t &= 150 \\t &= \frac{150}{30} \\t &= 5 \;years \end{aligned}$$

Max needs to leave his money in the savings account for 5 years to make $150 in interest.

Therefore, the answer is 5 years.'

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The wavelength of yellow light, approximately 0.00002 inches, can be best approximated as a power of 10. Among the given options, the number that represents this length most accurately is 2 x 10^-5.

The given wavelength of yellow light is 0.00002 inches. To express this length as a power of 10, we need to move the decimal point to obtain a number between 1 and 10.
In this case, we move the decimal point five places to the left, resulting in 0.00002 becoming 2 x 10^-5. The exponent of -5 indicates that the decimal point is shifted five places to the left, aligning with the original decimal value of 0.00002 inches.
Option C, 2 x 10^-5, is the closest approximation to the given wavelength. None of the other options match the given value. Option A, 2 x 10^5, is too large, option B, 2 x 10^-4, is too small, and option D, -2 x 10^5, has a negative sign which is not applicable in this context.
Therefore, the best approximation of the wavelength of yellow light, 0.00002 inches, as a power of 10 is represented by option C, 2 x 10^-5.

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The coordinates of the images of vertices L, M, N, and O after reflecting quadrilateral LMNO about the x-axis are: D. L’(2, -5), M’(2, -1), N’(-5, -2), and O’(-6, -4)

When a figure is reflected about the x-axis, the x-coordinates remain the same, but the y-coordinates are negated.

Given the original coordinates of quadrilateral LMNO, which are L(-2, 5), M(-2, -1), N(5, -2), and O(6, -4), we can apply the reflection to find the coordinates of the images.

For the x-axis reflection, the x-coordinates remain the same, so L' and M' will have x-coordinates of 2. For the y-coordinates, we negate the values, so L' will have a y-coordinate of -5, and M' will have a y-coordinate of -1.

Similarly, for N' and O', the x-coordinates will remain the same as the original figure, but the y-coordinates will be negated. Thus, N' will have coordinates (-5, -2), and O' will have coordinates (-6, -4).

Therefore, the correct answer is D, with the coordinates L’(2, -5), M’(2, -1), N’(-5, -2), and O’(-6, -4).

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With an 80% improvement in typing speed from an initial rate of 50 words per minute, you will be able to type 90 words per minute.

Increasing your typing speed by 80% means you will be able to type 80% more words in the same amount of time. Therefore, if your initial typing speed is 50 words per minute, an 80% improvement would result in a typing speed of 90 words per minute.

To calculate the new typing speed, we first find 80% of the initial typing speed.

80% of 50 is (80/100) * 50 = 0.8 * 50 = 40.

This means that your typing speed will increase by 40 words per minute.

To determine the new typing speed, we add the increase to the initial typing speed:

50 + 40 = 90.

Thus, after the 80% improvement, you will be able to type 90 words per minute.

In summary, with an 80% improvement in typing speed from an initial rate of 50 words per minute, you will be able to type 90 words per minute.


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a) A relative frequency interpretation of the probability of a double-yolk egg being 0.1 is that, in the long run or over a large number of eggs, approximately 10% of eggs will have double yolks.

b) If 5,000 eggs were randomly selected, we can estimate the number of double-yolk eggs we would expect to find by multiplying the probability of a double-yolk egg (0.1) by the total number of eggs (5,000).

Expected number of double-yolk eggs = 0.1 * 5,000 = 500 eggs.

a) The probability of a double-yolk egg being 0.1 can be interpreted as the relative frequency of finding double-yolk eggs over a large number of eggs. It means that if we were to select a significant number of eggs, approximately 10% of them would have double yolks. This interpretation is based on the assumption that the eggs are randomly selected and the probability remains constant.

b) To estimate the number of double-yolk eggs in a sample of 5,000 eggs, we can use the probability given in the article. By multiplying the probability of a double-yolk egg (0.1) by the total number of eggs (5,000), we can calculate the expected number of double-yolk eggs. In this case, the expected number would be 500 eggs. This means that, on average, we would expect to find 500 double-yolk eggs out of the 5,000 eggs randomly selected. It is important to note that this is an expected value based on probability, and the actual number of double-yolk eggs found may vary in any given sample.

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Factor completely 4x2 25x 6 is (4x + 3)(x + 2)(x + 1). The factors of 6 are (1)(6) or (2)(3).Let's find out which of these pairs will sum up to give 25x.

To factor completely 4x2 25x 6, we first find the factors of the quadratic equation and then group them together. We can start by the factoring of the quadratic term and the constant term separately, and then use the distributive law of multiplication to simplify the result.

Given expression: 4x2 25x 6The factors of 4x2 are (2x)(2x) or (4x)(x).

The factors of 6 are (1)(6) or (2)(3).Let's find out which of these pairs will sum up to give 25x.

The possible ways are:(2x)(3) and (4x)(1) with the product 6x and 4x, respectively.

(2x)(1) and (4x)(6) with the product 2x and 24x, respectively.

We can notice that (2x)(3) and (4x)(1) can give us 2x + 24x = 25x.

So, we can rewrite the given expression as:(4x + 3)(x + 2)(x + 1)

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The surface area of the prism is 96 cm², with dimensions of 88 cm by 88 cm.

To calculate the surface area of a prism, we need to find the sum of the areas of all its faces. In this case, the prism has a rectangular base with dimensions of 88 cm by 88 cm and four identical rectangular faces.

First, we calculate the area of the base by multiplying the length and width: 88 cm × 88 cm = 7744 cm². Since the base has two identical faces, we add this area twice: 7744 cm² × 2 = 15488 cm².

Next, we calculate the area of the other four faces, which are all identical. Each face is a rectangle with a length of 88 cm (the same as the base) and a height equal to the height of the prism. However, the height is not given in the question, so we cannot determine the area of these faces.

Therefore, with the given information, we can only calculate the surface area of the prism based on the known dimensions of the base, which is 15488 cm². It is important to note that without the height of the prism, we cannot determine the total surface area accurately.

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The angle x, at which the diagonal beam meets the 10-foot beam at the top of the frame is 16.7°.

Given a right-angled triangle which is given below.

The lengths of the legs are given as 10 feet and 3 feet.

It is required to find the angle x.

The trigonometric function which relates the given angles and sides of the triangle is:

tan x = 3/10

So,

tan x = 0.3

So, x = tan⁻¹(0.3)

         = 0.291 radians

         = 16.699°

         ≈ 16.7°

Hence the correct option for the angle x is 16.7°.

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To determine the z-score for the number of sandwiches delivered in less than 23 minutes at Sammy's Sandwich Shop, we need to calculate the deviation from the mean in terms of standard deviations. The z-score is -1.5.

The z-score measures the number of standard deviations a data point is from the mean. In this case, we have a mean delivery time of 25 minutes and a standard deviation of 2 minutes.

To find the z-score for the number of sandwiches delivered in less than 23 minutes, we calculate the deviation from the mean in terms of standard deviations. The formula for calculating the z-score is: z = (x - μ) / σ, where x is the data point, μ is the mean, and σ is the standard deviation.

Plugging in the given values, we have: z = (23 - 25) / 2 = -2 / 2 = -1.

Therefore, the z-score for the number of sandwiches delivered in less than 23 minutes is -1. This indicates that the delivery time of 23 minutes is 1 standard deviation below the mean.

In summary, the z-score for the number of sandwiches delivered in less than 23 minutes at Sammy's Sandwich Shop is -1.5.

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The expression (a+b+c)(d+e+f) consists of six terms, and each term contains three factors.

To understand the number of terms and factors in this expression, we need to expand it using the distributive property. The distributive property states that each term in the first expression is multiplied by each term in the second expression.

(a+b+c)(d+e+f): ad + ae + a f + bd + be + bf + cd + ce + cf

From the above, we can see that there are six terms, which are ad, ae, a f, bd, be, and bf.

Each term contains three factors: a factor from the first parentheses (a, b, or c), a factor from the second parentheses (d, e, or f), and a multiplication sign connecting them.

Therefore, the expression (a+b+c)(d+e+f) consists of six terms and each term contains three factors.

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