Find the sum and choose the correct answer. 2n3 + 4n2 - 7 and -n3 + 8n - 9

A. - n3 - 4 n2 - 8 n - 16
B. n3 + 4 n2 + 8 n + 16
C. 3 n3 + 4 n2 + 8 n - 2
D. n3 + 4 n2 + 8 n - 16

the eight graders whould be the answer

step-by-step explanation: could you give me 5 stars

sorry i really don't know what tiles and steps you are referring to

step-by-step explanation:

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2 equivalent expressions to represent the area of a rectangle and the top is n-3 and the side is 2

area of the rectangle = length * width

given length = n - 3

width = 2

replace it in the area

so area of the rectangle = (n-3) *2

= 2(n-3)

one of the expression is 2(n-3)

to get another expression we distribute 2 inside the parenthesis

2(n-3) is 2n - 6

so another expression is 2n - 6

two equivalent expression are

2(n - 3)   , 2n - 6