**Answer:**

20

**Step-by-step explanation:**

The sum of the ages of the first 12 is ...

12×18 = 216

The sum of the ages of the remaining 8 is ...

8×23 = 184

So, the sum of ages of all 20 people is ...

216 +184 = 400

and their average age is ...

400/20 = 20

**The mean age of the members of the group is 20**.

_____

The mean of a data set is the total of the values, divided by the number of values.

A rectangular poster has a length of 24 inches , and it’s width is 12 inches. What is the perimeter of the poster.

**Answer:**

**(24 + 12) x 2 = 72 inches**

A bookstore had 60 copies of a magazine. Yesterday, it sold 1/3 of them. Today, it sold 1/4 of what remained. How many copies does the bookstore have left?

**Answer:**

30

**Step-by-step explanation:**

1/3 of 60 is 20

40 would be left

1/4 of 40 is 10 so 30 would be left

50 POINTS!!!!!!! WILL MARK BRAINLIEST! NO COPY/PASTE! TWO TO THREE SENTENCES AND EXPLAIN! WILL REPORT STUPID ANSWERS! According to Nikita Khrushchev, Premier of the Soviet Union, which of the three events had the potential to advance Soviet interests the most? The three events are the Cuban Missile Crisis, The Space Race, and The Berlin Wall.

**Answer: **Soviet leader Nikita Khrushchev had gambled on sending the missiles to Cuba with the specific goal of increasing his nation's nuclear strike capability.

**Step-by-step explanation:**

find the value of p in the following equation: 6 * 2/4 = p * 1/4

**Answer: **[tex]p=12[/tex]

**Step-by-step explanation:**

[tex]6*\frac{2}{4}=p*\frac{1}{4}[/tex]

Solve the multiplication on the left side.

6 and 4 can be simplified.

6/2=3

4/2=2

Leaving it like;

[tex]3*\frac{2}{2}=p*\frac{1}{4}[/tex]

2 and 2 is 1 and 3 times 1 is 3.

[tex]3=p*\frac{1}{4}[/tex]

Multiply by 4 to eliminate the fraction and isolate p.

[tex]4*3=p*\frac{1}{4}*4\\12=p[/tex]

The table shows the number of cups of water required when cooking different amounts of rice.

Amount of

Rice

(cups) Amount of

Water

(cups)

2 5

3 7.5

5 12.5

8 20

Which statements apply to the ratio of rice and water? Choose two options.

The amount of rice is the dependent value.

The amount of water is the dependent value.

The amount of rice is the independent value.

The amount of water is the independent value.

The values cannot be labeled as dependent or independent without a given equation

**Answer:**

**Step-by-step explanation:**

The wording "the amount of water required for different amounts of rice" suggests that the "output" value of the table is the amount of water, and the "input" value is the amount of rice.

That makes "water" the *dependent* variable, and "rice" the *independent* variable.

**The amount of water is the dependent value.**

** The amount of rice is the independent value.**

**Answer:**

The amount of water is the dependent value.

The amount of rice is the independent value.

**Step-by-step explanation:**

How to add or subtract this polynomial

**Answer:**

18x^2 + 9x - 5

**Step-by-step explanation:**

Combine like terms:

(9x^2-8) + (9x^2+9x+3)

= 9x^2 + 9x^2 + 9x - 8 + 3

= 18x^2 + 9x - 5

Which of the following is a ray as shown in the drawing?

**Answer:**

DH

**Step-by-step explanation:**

this is just to comment to tell everyone this is multiple choice meaning it could be ad or ij togethe.

what's the solution to the inequality 1 2/3 > r - 7/12

**Answer:**

r ≤ 2 1/4

**General Formulas and Concepts:**

Pre-Algebra

Order of Operations:**Step-by-step explanation:**

Step 1: Define

1 2/3 ≥ r - 7/12

Step 2: Solve for *r*

Here we see that any number *r* less than or equal to 2 1/4 will work as a solution to the inequality.

Find the volume of a right circular cone that has a height of 12 cm and a base with a diameter of 18 cm.

Answer:1017.36 cm^3

Step-by-step explanation:

Diameter=18cm

Radius=r=18/2=9cm

Height=h=12cm

Volume of cone=1/3 x π x r^2 x h

Volume of cone=1/3 x 3.14 x 9^2 x 12

Volume of cone=1/3 3.14 x 9 x 9 x 12

Volume =(1x3.14x9x9x12) ➗ 3

Volume =3052.08 ➗ 3

Volume =1017.36

Volume of cone=1017.36 cm^3

how are a common denominator and a common multiple alike and diferent

**Answer:**

To find a common denominator of two fractions, you have to find a number that both denominators of the given fractions will divide into. And to find a common multiple, you have to find a number that both given numbers will divide into.

**Step-by-step explanation:**

**Answer:**

To find a common denominator of two fractions, you have to find a number that both denominators of the given fractions will divide into. And to find a common multiple, you have to find a number that both given numbers will divide into.

**Step-by-step explanation:**

Trust me,I will give braineist. I swear to god.

Answer:

= 1696m^3

Step-by-step explanation:

V = πr²h

= 3.14 x 6 x 6 x 15

= 3.14 x 540

= 1695.6 m^3

= 1696m^3

Two forces are acting on an object at the same point. Determine the angle between the two forces. (-2,7) and (3,-1)

The answer is 56 degree

**Answer:**

It is 124 degrees.

**Step-by-step explanation:**

You square each coordinate like this:

sqrt(x^2+y^2 )

You will end up getting sqrt(53 and sqrt(10.

Then find the dot product which is -6+-7=-13.

Then cos^-1(-13/sqrt53*sqrt10)

=124 degrees

-3b+7=13 solve for b

**Answer:**

b = -2

**Step-by-step explanation:**

Start with your given:

-3b + 7 = 13

Subtract 7 on both sides:

-3b = 6

Then, divide -3 on both sides and solve:

b = -2

**Answer:**

b = -2

**Step-by-step explanation:**

You start by subtracting the 7 on the left and move it to the other side. Then you have 6 on the right and -3b on the left. Then you divide the -3 on each side and that gives you b= -2.

Hope this helps.

Jason earned $54 at his job when he worked for 4 hours. What was his hourly pay rate in hours per dollar?

**Answer:**

$13.50

**Step-by-step explanation:**

$54 divided by 4 is $13.50.

What percentage of students who take honors English are taking a non-honors math class?

Answer:

B

Step-by-step explanation:

Took quiz GL

**Answer:**

the answer is not B

**Step-by-step explanation:**

the answer is A I actually took the quiz

If AB = 10, what is the length of DE?

11

5

12

3

Answer:

11

Step-by-step explanation:

**Answer:**

11

**Step-by-step explanation:**

40/27 ,20/9, 10/3 what is the next term in the geometric sequence ?

**Answer:**

5/1

**Step-by-step explanation:**

40/27

20/9

10/3

5/1

divided by 2 and 3 each other!

Which of the following expressions has the greatest value?

3^3 2^5 1^10 5^2

Answer:

2^5

Step-by-step explanation:

2^5 = 32

3^3=27

1^10 =1

5^2 = 25

Answer:

2^5

Step-by-step explanation:

Look at the attachment

PLS HELP ME!

Um doing venn digrams so u have to set one up for it to work... TWENTY POINTS

**Answer: **

Creating a diagram..

**Step-by-step explanation:**

Alrighty, I've made a diagram. I've even uploaded it so everyone can see how good at drawing I am (not)

a. 7 do not own anything.

b. the probability that someone owns a bone or a stick is 50%.

c. the probability that someone owns a rock and a bone is 14%.

d. the probability that someone owns at least 2 items is 42%.

e. the probability that someone owns only 1 of these items is 51%.

Please tell me if im wrong! im only a student .m.

Two part-time employees share one full-time job. A girl works Mondays. Thursday, Wednesdays, and Fridays, and a boy works Tuesdays. The job pays an annual salary of $28,612. What annual salary does each employee earn?

The girls salary is______

One year is 52 week, days of work is 5, 5*52 week is 260 days. One year salary is 28,612, use 28,612/ 260 =110.05 a day. If the boy works only one day a week the he only work 52 day in a year, so is 52*110.05=5722.4 for the boys.

Then use 28612-5722.4= 22889.60 is the girls salary

Then use 28612-5722.4= 22889.60 is the girls salary

What's your real rate of return if your savings account pays 2.5% interest and inflation is at 1%?

A. 1.5%

B. 2.5%.

C. 3.5%

D. Can't calculate.

**Answer:**

Real rate of return = 1.5%

**Step-by-step explanation:**

**Given:**

Savings account return = 2.5%

Inflation rate = 1%

**Find:**

Real rate of return = ?

**Computation:**

**⇒ Nominal rate of return = Real rate of return + Inflation rate**

⇒ Real rate of return = Savings account return - Inflation rate

⇒ Real rate of return = 2.5% - 1%

**⇒ Real rate of return = 1.5%**

What’s the correct answer for this?

**Answer:**

D: 8 and 2 and then 8 and 6.

**Step-by-step explanation:**

Corresponding angles are angles in the same position at an intersection of lines. For example, some of the corresponding angles in this picture are 1 and 7, and 8 and 2. Alternate interior angles are angles that are on the opposite sides of a transversal but are on the inner sides. For example, 8 and 6 and 7 and 5. If you look at all the options and use process of elimination, D will be the only possible answer. For A, 1 and 2 are not corresponding angles, as they are on opposite sides of the same line. For B, 4 and 6 are not alternate interior angles. They are vertical angles, congruent angles mirrored on the opposite side. For C, 7 and 2 are not corresponding angles, as they are not in the same relative position. Therefore, D is the only answer left. 8 and 2 are corresponding angles: they are both on the right side of the lines next to them. 8 and 6 are alternate interior angles, since they are on the opposite sides of the line, but on the inside.

Kelly needs 1/8 cups of sugar to make 1/4 of her cookie recipe. How much sugar does she need to make the entire recipe?

**Answer:**

1/2 cup of sugar

**Step-by-step explanation:**

She needs to multiply 1/8 cup of sugar by 4 to make the entire recipe since 18 cup of sugar is only good for a fourth of the recipe.

Write an equation that is parallel to the line y=3x-5 and passes through the point (-1,2)

Two lines with same slopes are parallel.

So The slope must be 3.

2=3(-1)+a

a=5

y=3x+5

So The slope must be 3.

2=3(-1)+a

a=5

y=3x+5

The (average) sales price for single family property in Seattle and Port Townsend is tabulated below.

Year Seattle Port Townsend

1970 $38,000 $8,400

1990 $175,000 $168,400

Find a linear model relating the year x and the sales price y for a single family property in Seattle.

**Answer:**

[tex]y=6,850x - 13,456,500[/tex]

**Step-by-step explanation:**

To find the linear model, we need to find a linear equation, where its slope is defined as

[tex]m=\frac{y_{2} -y_{1} }{x_{2}-x_{1} }[/tex]

So, we use the given points (1970, 38000) and (1990, 175000), to find the slope

[tex]m=\frac{175,000-38,000}{1990-1970}=\frac{137,000}{20} =6,850[/tex]

Now, we use the point-slope formula to find the equation

[tex]y-y_{1} =m(x-x_{1} )\\y-38000=6850(x-1970)\\y=6850x-13,494,500+38,000\\y=6,850x - 13,456,500[/tex]

Therefore, the linear model is

[tex]y=6,850x - 13,456,500[/tex]

Fifteen mothers were asked how many months old their babies were when they cut their first tooth. The results are shown below.

8, 8, 6, 8, 9, 10, 5, 7, 9, 5, 9, 7, 6, 8, 7

Find the range and the outlier(s), if any, of the data set.

range 5

there are no outliers

there are no outliers

3.5.49 X 0.67 *

Your answer

What is the answer

**Answer:**

2.37783 or 23.7783

**Step-by-step explanation:**

The typical amount of sleep per night that adults get has a bell-shaped distribution with a mean of 7.5 hours and a standard deviation of 1.3 hours. About 68% of adults typically sleep between a minimum of ___ hours a night and a maximum of ____ hours a night. Please enter your answer in the following format and round to the first decimal place: (min_value, max_value)

**Answer:**

(6.2, 8.8).

**Step-by-step explanation:**

**The Empirical Rule states that, for a normally distributed(bell-shaped) random variable:**

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

**In this problem, we have that:**

Mean = 7.5 hours

Standard deviation = 1.3 hours

**About 68% ...**

By the Empirical Rule, within 1 standard deviation of the mean.

7.5 - 1.3 = 6.2

7.5 + 1.3 = 8.8

So in the format requested

(6.2, 8.8).

Yuri computes the mean and standard deviation for the sample data set 12, 14, 9, and 21. He finds the mean is 14. His steps for finding the standard deviation are below.

s = StartRoot StartFraction (12 minus 14) squared + (14 minus 14) squared + (9 minus 14) squared + (21 minus 14) squared Over 4 EndFraction EndRoot. = StartRoot StartFraction negative 2 squared + 0 squared + negative 5 squared + 7 squared Over 4 EndFraction EndRoot. = StartRoot StartFraction 4 + 0 + 25 + 49 Over 4 EndFraction EndRoot. = StartRoot StartFraction 78 Over 4 EndFraction EndRoot. = StartRoot 19.5 EndRoot.

What is the first error he made in computing the standard deviation?

A. Yuri failed to find the difference between each data point and the mean.

B. Yuri divided by n instead of n -1.

C. Yuri did not subtract 9 - 14 correctly.

D. Yuri failed to square -2 correctly.

Answer:

B. Yuri divided by n instead of n-1

Step-by-step explanation:

It was stated in the question that the dataset was sample dataset. For a sample dataset, the standard deviation is given by the formula,

σ = √ Σ (Xi - mean)²/(n - 1) where i = 1,2,3.....n

Since this is just a sample dataset and not the whole population, Yuri should have divided by n-1 instead of n.

**Answer:**

B.

**Step-by-step explanation:**

(Here's Answers for the Quiz I did so far!)

1. Abby is collecting rainfall data.

Answer: B.

2. The Monthly Mean Salaries

Answer: A.

3. The Number of Cars at a Dealer Ship

Answer: A. (6.9)

4. The Mean Set of Credit Card Scores.

Answer: C. (720)

A child is laying on the ground relaxing and looking up at a plane that is passing by. If the plane’s altitude is 33,500 feet and the child’s eyes are located 8,200 feet away from a point on the ground directly beneath the plane, what is the angle of elevation for the child’s line of sight to the plane?

**Answer:**

about 76.2°

**Step-by-step explanation:**

The geometry can be modeled by a right triangle with the given dimensions being the side opposite the angle (height = 33,500 ft) and the side adjacent to the angle (8,200 ft). The fact that you know these two sides suggests the inverse of the tangent function may be useful.

Tan = Opposite/Adjacent

tan(angle) = (33,500/8,200)

angle = arctan (335/82) ≈ 76.246°

**The angle of elevation is about 76.2°**.

Colleen has a prepaid phone card with $40 on it. It costs her $0.25 for each minute she spends on the phone. How much money will be left on the card if she speaks for 60 minutes?
A radioactive isotope has a half life of 25 minutes. How many half lives have occurred after 175 minutes?5678Will give Brainliest
What year did the First World War begin?
What is the sticker price for a vehicle with the following features and costs: suggested retail price of $13,760, destination charge of $475, equipped with AC, cruise control, and a custom sound system for $800, $235, and $490, respectively?$15,760$13,760$13,370$11,760
Express the area of the entire rectangle.Your answer should be a polynomial in standard form.(3x^2 + 8x + 7) (7x^2)
1. f(x)=0.5x-1.5x +1I 4x3
The cost of a secured loan is typically lower than the cost of an unsecured loan because
Globalization had changed world politics by:
Order the steps needed to simplify this expression (3+1)^2-172+24/3+5Simplify inside parenthesesPerform addition and subtraction left to rightPerform multiplication and division Evaluate exponents
What are some examples of interest groups and how are they different? (Site 1)
Gonna need this in like 5 hrs please help
See question aboveA)7.2 cmB)9 cmC)10.6 cmD)12 cm
The Cold War can best be described as a __________. A. cause of World War II B. shooting war between the US and the USSR in Europe C. Russian revolution that overthrew the czar D. period of tension between countries who supported communism and those who opposed it. if you make up an answer you will be reported
how do you do pythagorean
The expression on the left side of an equation is shown below.3(x+1)+9=0If the equation has no solution, which expression can be written in the box on the other side of the equation?3[x+4)2[x+8)+x4(x-3) -03(x+1)+9x
PLEASE HELP MEEThree lines meet at a point that is also the endpoint of a ray. In complete sentences, describe the relevant angle relationships in the diagram. Find the value of each variable in the diagram.
Using the drop-down menus, identify whether the following definitions describe a producer, consumer,or decomposer.an organism that breaks down dead and decaying organisms to obtain energyan organism that takes in or consumes other organisms to receive energyan organism that uses the energy from the sun or inorganic substances to make itsown foodDONE
find the approximate probability that a randomly selected aspen tree in this park in 1975 would have a diameter less than 5.5 inches
Essay :Should student learn only subjects they like in school?
4. How does the speaker describe the sea as a final resting place? How does this develop the meaning of the poem? Cite evidence from the text in your answer.The OceanBy: Nathaniel Hawthornehttps://www.commonlit.org/texts/the-oceanThanks in advance