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4 years ago

Can someone help me get the answer but elimination please!!

Mathematics

1 answer:

pantera1 [17]4 years ago

7 0

Y = 5x - 2
9y = -2x + 10

9y = 3x + 8

y = (3/9)x + 8/9

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SOMEONE HELP?!! ASAP !! I’ll give brainliest!! Please and ty !!

dsp73

Answer:

$(\pi 4^2 (9))-(\pi 2^2 (9))$

and

$339.292 cm^3$

Step-by-step explanation:

This question is simple once you break it down.

Let's concentrate on the outer cylinder.

First, find the volume of the outer cylinder.

The volume of a cylinder is expressed as: $V = \pi r^2 h$

Gathering information from the diagram..

d = 8 cm

h = 9 cm

You can get the radius from the diameter by just dividing the diameter by 2.

$r = \frac{8}{2}=4$

r = 4

Plug everything into the volume equation.

$V = \pi 4^2 (9)$

Don't solve just yet!

Now, find the volume of the inner cylinder.

Do the exact same thing as you did for the outer cylinder.

d = 4 cm

h = 9 cm

$r = \frac{4}{2}=2$

r = 2

Plug everything into the volume equation..

$V = \pi 2^2 (9)$

The question asks for an expression to represent the volume of the large cylinder after the cylindrical hole is removed. This means you need to subtract the volume of the cylindrical hole from the volume for the large cylinder.

Again, the volume for the large cylinder is $V = \pi 4^2 (9)$ and the volume for the cylindrical hole is $V = \pi 2^2 (9)$

This means..

$(\pi 4^2 (9))-(\pi 2^2 (9))$

That is your answer to the first part of the question.

For the second part, just solve.

$(\pi 4^2 (9))-(\pi 2^2 (9))$

$(\pi*16*9)-(\pi*4*9)$

$(\pi*144)-(\pi*36)$

$144\pi-36\pi$

$108\pi$

$339.292$

Don't forget the units.

$339.292 cm^3$

Hope this helped you!

3 0

3 years ago

Read 2 more answers

A rectangle’s width is 2 meters shorter than its length, l. Its area is 168 square meters. Which equation can be used to find th

bija089 [108]

Answer:

l(l - 2) = 168

Step-by-step explanation:

Let w = width

Let l = length

Let A = area

w = l - 2

A = l * w

also, A = 168

equating the two values of A

l * w = 168

l * (l - 2) = 168

l^2 - 2l = 168

l(l - 2) = 168

7 0

3 years ago

Read 2 more answers

Find the area if the figure, pls write calculations

nataly862011 [7]

Answer:

area = 40.8 cm²

Step-by-step explanation:

The figure consists of a rectangle and a triangle.

area of rectangle = 12 × 2.4 = 28.8 cm²

area of triangle = $\frac{1}{2}$ bh ( b is the base and h the height )

Here b = 2.4 and h = 18 - 12 = 6 , then

area = $\frac{1}{2}$ × 4 × 6 = 2 × 6 = 12 cm²

area of figure = 28.8 + 12 = 40.8 cm²

8 0

3 years ago

you have sheets of craft paper. today you received 25 more sheets, and used 10. now you have 18 sheets left how many did you hav

pshichka [43]

X + 25 - 10. 25-10 is 15 so you had 15 after class. You must had 8 sheets of paper because 8+25=33. 33-15 is 18. So, you had 8 sheets of paper before class. Hope this helps!

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3 years ago

Which correctly explains how to estimate 55 percent of 64

taurus [48]

Answer: D

Step-by-step explanation:

Round 55 percent to 50 percent and 64 to 60. Think of 50 percent as 1/2. So 1/2 of 60 is 30

7 0

3 years ago

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