The distribution of ages of runners in a marathon is approximately normal. The oldest participant was 80 and the youngest was 13. Which of the following statements is true of the mean and median ages of the runners?

Answer:

Corresponding and x = 5

Step-by-step explanation:

To solve for x set the two equations equal to each other

5x+23 = 7x+13

10 = 2x

x = 5

the answer is in the pic.

Answer:

The answer is inside

Step-by-step explanation:

Answer:

1.

[tex] \frac{4}{5} = \frac{16}{20} [/tex]

2.

[tex] \frac{3}{7} = \frac{15}{35} [/tex]

3.

[tex] \frac{4}{3} = \frac{12}{9} [/tex]

4.

[tex] \frac{13}{15} = \frac{52}{60} [/tex]

5. the enlargement will be 9 inches

[tex] \frac{w}{15} = \frac{3}{5} [/tex]

multiply both sides by 15

[tex] \frac{w}{15} (15) = \frac{3}{5} (15) \\ w = 9[/tex]

6. 12 cm

7. 16

[tex] \frac{4}{2} = \frac{16}{8} [/tex]

4×4=16

8. 3.08

five u.s postal stamps cost $2.20 so we divide that by 5 to get the price of one which is $0.44

so $0.44 × 7 = $3.08

Answer:

It is just because f(9x-4) is a subtraction so it goes to the right.

Then the f(x+3) is addition so it goes to left.

Step-by-step explanation:

It is like the opposite of their signs the adding is left, and the subtraction is right.

Answer:

The circle's area is 153.93804 feet^2

Step-by-step explanation:

The formula for the area of a circle is [tex]a = \pi r^{2}[/tex]

Using this formula, input the number 7 in for "r" and solve:

a = pi ( 7 )^2

a = pi ( 49 )

a = 153.93804 feet^2

The area of the circle is 153.93804 feet^2. Round the number to the specified decimal point.

Answer:

x=-6

Step-by-step explanation:

Divide both sides by -4

You will get an answer of x=-6.

Answer:

x = 0

Step-by-step explanation:

Given

- 4 =  3 + 7(x - 1) ← distribute and simplify right side

- 4 = 3 + 7x - 7

- 4 = 7x - 4 ( add 4 to both sides )

0 = 7x  , then

x = 0

Isolate the variable by dividing each side by factors that don't contain the variable.

Inequality Form: n<−1

Interval Notation: (−∞,−1)

Answer:

x=132

Step-by-step explanation:

180-48=132

Hope this helps!

Answer:

[tex]x[/tex] = 132°

Step-by-step explanation:

A straight line is always equal to 180° so

180 - 48 = 132

[tex]x[/tex] = 132°

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Answer:

b

Step-by-step explanation:

cause i ik

Answer:

(A) a scatterplot with an odd number of points in which the correct regression line passes directly through 0 of the points

Step-by-step explanation:

The trend line will not  pass thru any points

Edge2021>>>>> I just need Brainliest to move on to the next level soo....

Answer:

The length of h is 3cm.

Step-by-step explanation:

You are looking for h. In order to find h you need the equation of area of a triangle, which is a=1/2bh. They give you base and they give you area. Plugging the numbers in, the equation is 7 7/8 cm^2= 1/2(5 1/4)(h). Now you solve by getting h by itself.

2(7 7/8 cm^2)= (1/2(5 1/4)(h))2

(15 3/4)/(5 1/4)= ((5 1/4)(h))/(5 1/4)

3=h

Answer:

The answer is h+ 3cm

Step-by-step explanation:

Answer:

47%

Step-by-step explanation:

.375 × .125 = .046875

rounding up, 5 keeps the 7 as is, 7 is greater than 5, therefore the 8, becomes a 9, 9 is greater than 5, so the 6 becomes a 7, .047.

move the decimal three digits to the left and you get, 47%.

Percentage markup is the percent of the difference of the selling price to the buying price of a product. The percent markup for a cup of coffee is 200%.

The percentage markup has to be find out for the cup of coffee.

Percentage markup is the percent of the difference of the selling price to the buying price of a product. It can be given as,

[tex]M=\dfrac{\rm SP-C}{C} \times 100[/tex]

Here, [tex]SP[/tex] is the selling price and [tex]C[/tex] is the cost of the product.

Given information-

The Cup o Coffee buys its coffee for $1.25 a cup.

The Cup o Coffee sells its coffee for $1.25 a cup.

To find out the percentage markup for the cup of coffee, put the values in the above formula. Thus,

[tex]M=\dfrac{3.75-1.25}{1.25} \times 100\\M=\dfrac{2.5}{1.25} \times 100\\M=200[/tex]

Hence the percent markup for a cup of coffee is 200%.

Learn more about the percentage markup here;

https://brainly.com/question/26085685

Correct question:

Adrian needs to be at school at 7:45 am. It takes him 15 minutes to walk to school, 5/12 hour to eat breakfast, 0.7 hour to get dressed, and 0.15 hour to shower. What time should he wake up.

Answer:

Adrian should wake up by 6.14 am

Step-by-step explanation:

Given;

time to walk to school, = 15 mins

time to eat breakfast = 5/12 hour = 25 mins

time to get dressed = 0.7hour = 42 mins

time to shower = 0.15 hour = 9 mins

time Adrian needs to be in school = 7.45 am

Count from this time he needs to be at school backwards by subtracting the time he will spend before reaching school;

7.45 am - 15 mins = 7.30 am

7.30 am - 25 mins = 7.05 am

7.05 am - 42 mins = 6.23 am

6.23 am - 9 mins = 6.14 am

Therefore, Adrian should wake up by 6.14 am

Answer:

if this helps

Step-by-step explanation:

24x-13+=24x-12-1

-13=-12-1

-13=-13

Answer:

24x-13+=24x-12-1

-13 = -12 -1

-13 = -13

x = 1

one solution

Step-by-step explanation:

i am not sure if it is correct but i tried

Answer:

36CDs

Step-by-step explanation:

The number of CDs in Walter's collection can be represented by x. The number of CDs in Brian's collection is 3 times the number in Walter's collection.

Hence, Brian's collection = 3x

The total number of CDs in both collections is 144.

We have the Equation:

x + 3x = 144

4x = 144

x = 144/4

x = 36

Therefore, the number of CDs in Walter's collection is 36 CDs

Answer:

Infinite solutions

Step-by-step explanation:

After you distribute, you get -108. The equation doesn't have an equal sign, but I don't think that matters. For every possible value of y, you get the answer -108, so the answer is either infinite solutions, or no solutions, depending on what you are trying to get the equation to equal to.

If it's a typo, and the negative is supposed to be an equal sign, the answer is no solutions.

Answer:

2x-8

Step-by-step explanation:

Answer:

2x-8

Step-by-step explanation:

If your doing distributive property then you multiply the 2 by the x and the 8 which will give you

2x-8

Answer: The barrel holds about 58.44 gallons of oil .

Step-by-step explanation:

Given : For cylinder , diameter = 22 inches and height = 35.5 inches

radius = 11 inches [half of diameter]

Volume of cylinder  [tex]=\pi r^2h[/tex], where r= radius and h = height.

Volume of cylinder  [tex]=\dfrac{22}{7}\times(11)^2\times 35.5=13500.14\text{ cubic inches}[/tex]

Since, There are 231 cubic inches in a liquid gallon, so.

1 cubic inch = [tex]\dfrac{1}{231}[/tex] gallon.

13500.14 cubic inch = [tex]13500.14\times\dfrac{1}{231}\approx58.44\text{ gallons}[/tex]

Hence, The barrel holds about 58.44 gallons of oil .

Answer: Its A

Step-by-step explanation:

Answer:

2640

Step-by-step explanation:

Yes:No = 7:5

Total votes = 6336

So, 7x+5x = 6336

12x = 6336

x = 6336/12 = 1056/2 = 528

Number of No votes = 5*528 = 2640

Answer:

you are right its B since if we count to the left its -5 and then we going up which is positive 3

Answer:26

Step-by-step explanation:

The value of f(3) is 26.

An expression, rule, or law that defines a relationship between one variable (the independent variable) and another variable (the dependent variable).

Given function:

f(x) = 5(x + 1) + 2x

as, we have to find the Sean running in week 3

So, f(3) = 5(3 + 1) +2 (3)

f(3) = 5(4) + 6

f(3) = 20 +6

f(3) =26

Hence, the value of f(3) is 26.

Learn more about function here:

https://brainly.com/question/12431044

#SPJ2

Answer:

About 60 sales.

Step-by-step explanation:

Answer:

? = 6/7

Step-by-step explanation:

x * 7/2=3

7/2x=3

2(7/2x)=2(3)

7x=6

x=6/7

Given:

The number of pages she has left to read is 276−35d, where d represents the number of days she has been reading.

To find:

The explanation of each part of the expression.

Solution:

The given expression is

[tex]276-35d[/tex]

Here, 276 is initial number of pages or total number of pages.

d is number of days she has been reading.

-35 represents the remaining pages decreased by 35 per day.

35d is number of pages she reads in d days she has been reading.

Therefore, total number of pages is 276 and number of pages she reads each day is 35.

Answer:

36 tickets

Step-by-step explanation:

First you set up your equation, which would be 12 + 0.50x = 30. Next you subtract 12 on both sides to get 0.50x = 18. Divide both sides by 0.50 to get x = 36.

Answer:

The problem uses the perimeter formula.  P = 2w + 2l   where w is the width, and l is the length.

We know the length (l) is 3 inches longer than it's width (or l = w+3).  Substitute w +3 into Perimeter equation.

P = 2w + 2(w+3).  That simplifies to P = 4w + 6.

Since P + 42,   we have 42 = 4w +6.  With some simple algebra we find that w = 9 and l = 12.

Answer:

up 8

Step-by-step explanation:

hope this helped you