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zhuklara [117]
2 years ago
6

Combine like terms in the given polynomial. Then, evaluate for x = 4, y = – 2.

Mathematics
1 answer:
EastWind [94]2 years ago
5 0

Answer:

- 2 x y^2+3 x^2 y -xy

-120

Step-by-step explanation:

xy – 2xy + 3x^2 y — 4x y^2 + 2xy^2

Combine like terms

xy – 2xy + 3x^2 y — 4x y^2 + 2xy^2

- x y+3 x^2 y - 2 x y^2

Let x = 4 y = -2

-(4)(-2) +3(4)^2 (-2) -2(4)(-2)^2

Exponents first

-(4)(-2) +3(16) (-2) -2(4)(4)

Multiply

+8 -96-32

Add and subtract

-120

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Answer:

28meters and 112meters

Step-by-step explanation:

one piece is x

the other is 4x

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divide both sides by 5

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3 0
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<em>first multiplication and next addition</em>

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3 years ago
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The following prism has a base area of 20\pi20π20, pi square units and a volume of 120\pi120π120, pi cubic units. The cylinder h
vivado [14]

Given:

A prism has a base area of 20\pi square units and a volume of 120\pi cubic units.

To find:

The volume of the cylinder if the cylinder has the same base area and height.

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