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3 years ago

An event manager recorded the number of people in different age groups that attended a music concert.

Mathematics

2 answers:

earnstyle [38]3 years ago

7 0

Answer:

its B

Step-by-step explanation:

i took the test

kramer3 years ago

4 0

Answer:D

Step-by-step explanation:

so the bins are 18-24, 25-31, 32-38, and 39-45.

the order is 20, 40, 120, and 80.

So if you match them up you get:

18-24 20

25-31 40

32-38 120

39-45 80

The only answer with all of those is D

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What shape is this? A.cylinder B.square C.rectangle D.tetrahedron

Mice21 [21]

Thats a rectangle .........

6 0

2 years ago

Need help understanding this problem please

faust18 [17]

f(g(x)) is a composite function:

$f(g(x))=f(\sqrt{x+5})=2\sqrt{x+5}-1$

Plug in x = 4:

$f(g(4)) = 2\sqrt{4+5}-1=2\sqrt9-1=2\cdot3-1=\boxed{5}$

so the answer is C.

7 0

3 years ago

Semicircles

Studentka2010 [4]

Answer:

The area of the shaded portion of the figure is $9.1\ cm^2$

Step-by-step explanation:

see the attached figure to better understand the problem

we know that

The shaded area is equal to the area of the square less the area not shaded.

There are 4 "not shaded" regions.

step 1

Find the area of square ABCD

The area of square is equal to

$A=b^2$

where

b is the length side of the square

we have

$b=4\ cm$

substitute

$A=4^2=16\ cm^2$

step 2

We can find the area of 2 "not shaded" regions by calculating the area of the square less two semi-circles (one circle):

The area of circle is equal to

$A=\pi r^{2}$

The diameter of the circle is equal to the length side of the square

$r=\frac{b}{2}=\frac{4}{2}=2\ cm$ ---> radius is half the diameter

substitute

$A=\pi (2)^{2}$

$A=4\pi\ cm^2$

Therefore, the area of 2 "not-shaded" regions is:

$A=(16-4\pi) \ cm^2$

and the area of 4 "not-shaded" regions is:

$A=2(16-4\pi)=(32-8\pi)\ cm^2$

step 3

Find the area of the shaded region

Remember that the area of the shaded region is the area of the square less 4 "not shaded" regions:

$A=16-(32-8\pi)=(8\pi-16)\ cm^2$

---> exact value

assume

$\pi =3.14$

substitute

$A=(8(3.14)-16)=9.1\ cm^2$

8 0

3 years ago

Which equation shows the correct use of the Distributive Property? −4(32x−12)=−15

KengaRu [80]

Answer:

-128x + 48 = -15

Step-by-step explanation:

I don't any choices to pick from but using the distributive property you will multiply the -4 by everything in the parenthesis.

-4(32x - 12) = -15

=-128x + 48 = -15.

6 0

3 years ago

Read 2 more answers

What is the greatest common factor of the following terms? 20x4y3, 26x5y3 and 12x2y3

Lena [83]

Answer:

2x²y³

good luck, i hope this helps :)

8 0

3 years ago