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2 years ago

Simplify: (x2 − 8x + 5) + (−3x2 + 5x − 9)

Mathematics

1 answer:

tekilochka [14]2 years ago

6 0

Combine like terms (those with same number of variables)

x² + (-3x²) = -x²

-8x + 5x = -3x

5 - 9 = -4

-x² - 3x - 4 is your answer

hope this helps

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Step-by-step explanation:

<u><em>The complete question is</em></u>

A film canister in the shape of a cylinder has a height of 8 centimeters and a volume of 32π cubic centimeters.

a. Write an equation for the volume of the film canister.

b. What is the radius of the film canister?

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3 years ago

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<h3>Answer: 10 cm (choice A)</h3>

====================================================

Explanation:

One equation we could solve is

x/2.5 = 30/7.5

Note the x/2.5 has us dividing the vertical sides, while 30/7.5 is the same idea for the horizontal sides. The order is large over small. You could do small over large, but make sure you keep both sides consistent.

Solving for x leads to...

x/2.5 = 30/7.5

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There are many other possible equations that lead to the same answer. One other possible equation is x/30 = 2.5/7.5

These proportions are possible due to the fact we have similar triangles.

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