3 years ago

I need help!!!!!!!!!!

Mathematics

1 answer:

ad-work [718]3 years ago

3 0

9514 1404 393

Answer:

21. 3x^2 +7x

22. 6x^3 +3x

Step-by-step explanation:

21. The perimeter is the sum of the side lengths.

P = (x^2 +3x +1) +(4x -1) +(2x^2)

P = x^2(1 +2) +x(3 +4) +(1 -1) . . . . combine like terms

P = 3x^2 +7x

22. The area is the product of the dimensions.

A = (3x)(2x^2 +1)

A = 6x^3 +3x . . . . . use the distributive property

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