Help only 19 & 21 please thank you

Help Only 19 & 21 Please Thank You

Answers

Answer 1

Answer:

19) The square root of 35 with one digit decimal accuracy is 5.9.

21) The sqrt. of 61 to the nearest integer is 8!

Step-by-step explanation:

take the square roots around 61.

the square root of 8 is 64,

the square root of 7 is 49.

61 is closer to 64.

Integers cannot be fractions, so the answer of 7.8 is rounded up to 8! (This Is For Number 21)am not really that sure about number 19


Related Questions

Which set of statements explains how to plot a point at the location (Negative 3 and one-half, negative 2)?

A: Start at the origin. Move 3 and one-half units right because the x-coordinate is Negative 3 and one-half. Negative 3 and one-half is between 3 and 4. Move 2 units down because the y-coordinate is -2.


B: Start at the origin. Move 3 and one-half units down because the x-coordinate is Negative 3 and one-half. Negative 3 and one-half is between -3 and -4. Move 2 units left because the y-coordinate is -2.


C: Start at the origin. Move 3 and one-half units down because the x-coordinate is Negative 3 and one-half. Negative 3 and one-half is between -3 and -4. Move 2 units right because the y-coordinate is -2.


D: Start at the origin. Move 3 and one-half units left because the x-coordinate is Negative 3 and one-half. Negative 3 and one-half is between -3 and -4. Move 2 units down because the y-coordinate is -2.

Answers

Answer:

D: Start at the origin. Move 3 and one-half units left because the x-coordinate is Negative 3 and one-half. Negative 3 and one-half is between -3 and -4. Move 2 units down because the y-coordinate is -2.

Please help, I will give brainliest if you answer.
An angle measures 78.6° more than the measure of its supplementary angle. What is the measure of each angle?

Answers

Answer:

so required angles are 50.7°and 129.3°

Step-by-step explanation:

Let the angle be x

another angle = x + 78.6°

so,

x + x + 78.6° = 180° {being sum of supplementary angle}

so, 2x + 78.6° = 180°

or, 2x = 180° - 78.6°

or, x = 101.4/2

so, x = 50.7°

so another angle = x + 78.6°

= 50.7° + 78.6°

= 129.3°

Type your answer into the box. X 30° Calculate the size of angle x. angle x =​

Answers

Answer:

x = 60°

Step-by-step explanation:

We know:

All triangles have internal angles that add up to 180°.

And

All right triangles have acute angles that up to 90°.

Therefore

x + 30° + 90° = 180°

x + 120° = 180°     |subtract 120° from both sides

x + 120° - 120° = 180° - 120°

x = 60°or

x + 30° = 90°     |subtract 30° from both sides

x + 30° - 30° = 90° - 30°

x = 60°

The size of angle x will be 60°

Triangle

It is a plane figure with three straight sides and three angles.

What are steps to solve this  problem?

The steps are as follow:

As per rule of triangle, the sum of all three internal angle must be equal to 180°The given triangle is right angle triangle having one angle 30° and other we have to findGiven:

z = 90°

y = 30°

x = ?

∴ x + y + z = 180°

∴ x + 30 + 90 = 180

∴ x + 120 = 180

∴ x = 60°

So the size of angle x will be 60°

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Multiply (8 + 3i)(3 + 5i).
39 + 491
9+ 491
24 + 152
24 + 491 + 15/2

Answers

24+491+15/2 is
=522.5

(8+3)(3+5)=88

88+(39+491)= 618.

88+(9+491)= 588

88+(24+152)= 264.

sorry could not find the last ansswer..

Given the directrix of y = 6 and focus of (0, 4), which is the equation of the parabola?\

Answers

Answer:

The directrix is y=6 and focus is (0,4)

The equation of the parabola is,

20-4y=x²

surface areas of two similar figures are given. the volume of the larger figure is given. find the volume of the smaller figure​

Answers

9514 1404 393

Answer:

  216 in³

Step-by-step explanation:

The ratio of volumes is the 3/2 power of the ratio of areas.

  small volume = ((small area)/(large area))^(3/2) × (large volume)

  = (212/1325)^(3/2) × 3375 in³ = (4/25)^(3/2) × 3375 in³ = (8/125)×3375 in³

  small volume = 216 in³

The scores for a particular examination are normally distributed with a mean of 68.5% and a standard deviation of 8.2%. What is the probability that a student who wrote the examination had a mark between 80% and 100%? Give your answer to the nearest hundredth.

Answers

Answer:

[tex]P(80/100<x<100/100)=0.08[/tex]

Step-by-step explanation:

We are given that

Mean,[tex]\mu=68.5[/tex]%=68.5/100

Standard deviation, [tex]\sigma=8.2[/tex]%=8.2/100

We have to find the probability that a student who wrote the examination had a mark between 80% and 100%.

[tex]P(80/100<x<100/100)=P(\frac{80/100-68.5/100}{8.2/100}<\frac{x-\mu}{\sigma}<\frac{100/100-68.5/100}{8.2/100})[/tex]

[tex]P(80/100<x<100/100)=P(1.40<Z<3.84)[/tex]

We know that

[tex]P(a<Z<b)=P(Z<b)-P(Z<a)[/tex]

Using the formula

[tex]P(80/100<x<100/100)=P(Z<3.84)-P(Z<1.40)[/tex]

[tex]P(80/100<x<100/100)=0.99994-0.91924[/tex]

[tex]P(80/100<x<100/100)=0.0807\approx 0.08[/tex]

Solve - 2x - 7 > X+ 8.
O A. x<-3
O B. x<-5
O C. x>-5
O D. x>-3

Answers

Answer:

x < -5

Step-by-step explanation:

- 2x - 7 > x+ 8

Add 2x to each side

- 2x+2x - 7 > x+2x+ 8

-7 > 3x+8

Subtract 8 from each side

-7-8 > 3x+8-8

-15 > 3x

Divide by 3

-15/3 > 3x/3

-5 >x

x < -5

1/2 litre of kerosene costs $1.50what is the cost ofn2 litre of kerosene​

Answers

Answer:

$6

Step-by-step explanation:

1.5 × 2 = 3

1 liter = $3

3 × 2 = 6

2 liters of kerosene is $6

6 dollars is the cost of the kerosene

When male workers were asked how many hours they worked in the previous​ week, the mean was with a standard deviation of . Does this suggest that the population mean work week for men exceeds ​hours

Answers

Answer:

We can conclude that the population mean work week for men exceed 40 hours.

Step-by-step explanation:

Given that :

Mean, xbar = 45.6

Standard deviation, s = 14.6

Sample size, n = 893

x = 40

Hypothesis :

H0 : μ = 40

H1 : μ > 40

Using test statistic for one sample t test :

Test statistic = (xbar - μ) ÷ (s/√(n))

Test statistic = (45.6 - 40) ÷ (14.6/√(893))

T = (5.6 / 0.4885703)

Test statistic = 11.46

Using the Pvalue approach :

Reject H0 : if Pvalue < α

Pvalue for test statistic of 11.46 will be approximately 0 (Extremely low)

Hence, Pvalue < α ; We reject H0 ; and conclude that population mean work week for men exceed 40 hours

A store offers different brands of a product. It decides to eliminate the brand
that is most likely to be returned. The table shows the number of items of
each brand that were returned over the past year and the total sold.
Retums
Total sold
Brand A
40
913
Brand B
38
792
Brand C
21
626
Brand D
15
451
Which brand should the store eliminate?

Answers

Answer:

In my points of view brand D should elimininate.In table have show the brand of D.If I am wrong I am sorry for talking 5pbt

The brand B must be eliminated since it has highest percentage 4.79%.

What is percentage?

Percentage is defined as a given part or amount in every hundred. It is a fraction with 100 as the denominator and is represented by the symbol "%".

Here,

Brand A percentage = 40/913 ×100

= 4.38%

Brand B percentage = 38/792 ×100

= 4.79%

Brand C percentage = 21/626 ×100

= 3.35%

Brand D percentage = 15/451 ×100

= 3.32%

Therefore, brand B must be eliminated since it has highest percentage 4.79%.

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An object is dropped from 24 feet below the tip of the pinnacle atop a 1468-ft tall building. The height h of the object after t seconds is given by the equatior h= - 16t2 + 1444. Find how many seconds pass before the object reaches the ground. seconds pass before the object reaches the ground. (Type an integer or a decimal.)​

Answers

Answer:

9.5 seconds pass before the object reaches the ground.

Step-by-step explanation:

Height of the ball:

The height of the ball after t seconds is given by the following equation:

[tex]h(t) = -16t^2 + 1444[/tex]

Find how many seconds pass before the object reaches the ground.

This is t for which h(t) = 0. So

[tex]h(t) = -16t^2 + 1444[/tex]

[tex]-16t^2 + 1444 = 0[/tex]

[tex]16t^2 = 1444[/tex]

[tex]t^2 = \frac{1444}{16}[/tex]

[tex]t^2 = 90.25[/tex]

[tex]t = \pm \sqrt{90.25}[/tex]

Since it is time, we only take the positive value.

[tex]t = 9.5[/tex]

9.5 seconds pass before the object reaches the ground.

Simplify: 4- (3 1)2 - 6 2 4 2. Combine like terms: 7x3 2x - 5x2 6 x 9 3x3 12x2 3. Simplify: (2x5- ... Multiply: 3x2(4x3 - 2x2 7x - 4) 5. Evaluate: 6x2 ...

Answers

Answer:

The complete question is defined in the attached file please find it.

Step-by-step explanation:

For question 1:

[tex]\to 4-(3+1)^2 - 6\div 2 +4 \\\\\to 4-(4)^2 - 6\div 2 +4\\\\\to 4-16 - 3 +4\\\\\to 4-19 +4\\\\\to 4-15\\\\\to -11[/tex]

For question 2:

[tex]\to 7x^3 +2x -5x^2+6+ x+ 9+ 3x^3 +12x^2 \\\\\to 7x^3 +3x^3+12x^2 -5x^2+2x+x+9+6 \\\\\to 10x^3 +7x^2+3x+15 \\\\[/tex]

For question 3:

[tex]\to (2x^5- 3x^2+4)-(x^5+2x^2+7)\\\\\to 2x^5- 3x^2+4-x^5-2x^2-7\\\\\to x^5- 5x^2-3\\\\[/tex]

For question 4:

[tex]\to 3x^2(4x^3- 2x^2+7x -4) \\\\\to 12x^5- 6x^4+21x^3 -12x^2 \\\\[/tex]

For question 5:

[tex]\to 6x^2+9x-7 \ \ \text{when} \ \ x=2\\\\\to 6(2)^2+9(2)-7 \\\\\to 6(4)+9(2)-7 \\\\\to 24+18-7 \\\\\to 24+11 \\\\\to 35[/tex]

1 + 1 = 3 is this right

Answers

Yes obviously this is riggh

Answer:

1 + 1 = 3 - 1 = 2

Step-by-step explanation:

Im Smart

Find the sum of the series if possible, if not possible explain why:

1+(−2/5)+(−2/5)^2+(−2/5)^3+⋯

Answers

Answer:

Step-by-step explanation:

5/7

Sum of a geometric series is a/(1-r) = 1/(1-(-2/5)) = 5/7

how many terms are there in the series. 201.208.215......319​

Answers

Answer:

222

Step-by-step explanation:

add 7 no. to each of like 201+7 = 208, 208+7=215 ,215+7=222

I need help pls help me in geometry homework

Answers

You can use photo math but the first one is b

Given that f(x)=x^2 and g(x)=5x+2 ​, find (f-g)(2)​, if it exists.

Answers

Answer:

(f - g)(2) = -8

General Formulas and Concepts:

Pre-Algebra

Distributive Property

Algebra I

Terms/CoefficientsFunctionsFunction Notation

Step-by-step explanation:

Step 1: Define

Identify

f(x) = x²

g(x) = 5x + 2

Step 2: Find

Substitute in functions:                                                                                     (f - g)(x) = x² - (5x + 2)[Distributive Property] Distribute negative:                                                    (f - g)(x) = x² - 5x - 2Substitute in x [Function (f - g)(x)]:                                                                   (f - g)(2) = 2² - 5(2) - 2Evaluate:                                                                                                          (f - g)(2) = -8

many ® Black pencils cost N75 each and coloured pencils cost N105 each. If 24 mixed pencils cost #2010, how of them were black? (Hint: Let there be x black pencils. Thus there are 24 - x) coloured pencils.)​

Answers

Answer:

85

Step-by-step explanation:

I hope my answer help you

3x-2=2(x-5)

find the value of x ​

Answers

Now we have to,

find the required value of x.

Let's begin,

→ 3x-2 = 2(x-5)

→ 3x-2 = 2x-10

→ 3x-2x = -10+2

→ x = -8

Hence, value of x is -8.

Answer:

x = -8

Step-by-step explanation:

3x - 2 = 2 ( x + 5

Solve for x.

Let's solve,

3x - 2 = 2 ( x + 5 )

Step 1:- Distribute 2.

3x - 2 = 2 × x + 2 × 5

3x - 2 = 2x - 10

Step 2 :- Move constant to the right-hand and change their sign.

3x = 2x - 10 + 2

Step 3:- Add -10 and 2.

3x = 2x - 8

Step 4 :- Move variable to the left-hand side and change their sign.

3x - 2x = -8

Step 5 :- Subtract 2x from 2x.

x = -8

Hence, value of x = -8.

(2 + i)-(4 - 6/)(-3 +3/)

Answers

Answer:

C

Step-by-step explanation:

(2+i)-(4-6i)(-3+3i)

=(2+i)-(-12+12i+18i-18i^2)

=(2+i)-[-12+30i-18(-1)]

=(2+i)-(-12+30i+18)

=(2+i)-(30i+6)

=2+i-30i-6

=-4-29i

In 1995 the U.S. federal government debt totaled 5 trillion dollars. In 2008 the total debt reached 10 trillion dollars. Which of the following statements about the doubling time of the U.S. federal debt is true based on this information?

Answers

Where are the statements?

2. What polygon is formed if you divide this figure into three equal parts? A squares B. triangles C. rhombuses D. kites​

Answers

Answer: C

Step-by-step explanation:

Which of the following is true about congruent figures?

Answers

They're the same shape and the same size. They're the same size, but not the same shape.

Use the distributive property to remove parentheses.
-8(x-3w-2)

Answers

9514 1404 393

Answer:

  = -8x +24w +16

Step-by-step explanation:

The factor outside multiplies each term inside parentheses.

  -8(x -3w -2) = (-8)(x) +(-8)(-3w) +(-8)(-2)

  = -8x +24w +16

Module 8: Directions: Respond to this question to demonstrate your understanding of the topic/content. Be sure to provide adequate and relevant details learned in the module to support your response. Pay close attention to organizing your response so it makes sense and uses correct grammar. Your response should be at least 5-7 sentences at a minimum.



Question: Describe how to eliminate the parameter to change from parametric to rectangular form. How does this ability help us with graphing parametric equations?

Answers

Answer:

rectangular equation, or an equation in rectangular form is an equation composed of variables like xx and yy which can be graphed on a regular Cartesian plane. For example y=4x+3y=4x+3 is a rectangular equation.

A curve in the plane is said to be parameterized if the set of coordinates on the curve, (x,y)(x,y) , are represented as functions of a variable tt .

x=f(t)y=g(t)x=f(t)y=g(t)

These equations may or may not be graphed on Cartesian plane.

Step-by-step explanation:

I hope this helps

d = 3.2(t+1)(2t - 3)

An air pump increases the oxygen levels in
an aquarium and reduces the build-up of
waste materials. The equation shown above
gives the depth, d, in inches of an air
bubble beneath the surface of the water t
seconds after it emerges from the air pump.
After how many seconds does the air
bubble reach the surface?

Answers

Answer:

3/2=1.5 sec

Step-by-step explanation:

Equate d=0 and solve the expression, t=-1 and 3/2 but t can't be negative.

The air bubble will reach the surface in 1.5 seconds.

What is an expression?

Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication and division.

The given expression is d = 3.2(t+1)(2t - 3) where d is the height of the aquarium and t is the time taken by the bubbles to come to the surface.

When the bubble will come to the surface height D becomes zero.

d = 3.2(t+1)(2t - 3)

3.2(t+1)(2t - 3) = 0

t + 1 = 0  and  2t - 3 = 0

t = -1  and t = 3 / 2 = 1.5

Therefore, the air bubble will reach the surface in 1.5 seconds.

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What is the reason for each step in the solution of the equation?
-5(x - 6) = 10x
Drag and drop the reasons into the boxes to correctly complete the table.
–5(x – 6) = 10x
Given
-5x + 30 = 10x
30 = 15x
2 = x
Division Property of Equality
Commutative Property
Addition Property of Equality
Given
Distributive Property

Answers

Answer:

Distributive property (-5 is being multiplied to x and - 6)

Addition property of equality (5x is being added in both side of the equation)

Division property of equality (15 is being devided in both side of the equation)

Brainliest please~

The reason for each step will be

Distributive property (-5 is being multiplied to x and - 6)

Addition property of equality (5x is being added in both sides of the equation)

Division property of equality (15 is being divided into both sides of the equation)

What are algebraic properties?

We can solve mathematical equations thanks to algebra's inherent characteristics. The algebraic properties are distributive property, addition property of equality, and division property of equality.

Given expressions are:-

-5x + 30 = 10x

30 = 15x

2 = x

-5x + 30 = 10x ⇒ Distributive property (-5 is being multiplied to x and - 6)

30 = 15x ⇒ Addition property of equality (5x is being added in both sides of the equation)

30 = 15x ⇒ Division property of equality (15 is being divided into both sides of the equation)

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[tex]\lim_{x \to \4} x^{2} -3x[/tex]

Answers

(4)^2-3(4)=4Answer:

Step-by-step explanation:

Write an expression representing the unknown quantity.

There are 5,682,953 fewer men than women on a particular social media site. If x represents the number of women using that site, write an expression for the number of men using that site.

The expression for the number of men is
.

Answers

9514 1404 393

Answer:

  x - 5,682,953

Step-by-step explanation:

If x is the number of women, and the number of men is 5,682,953 less, then the number of men is x -5,682,953

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