Isaacdozier321idn
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Answer:

D. 15x² + 62x + 63

Step-by-step explanation:

                  rectangle area: length * width

Here the length is ( 3x + 7 ) and width is (5x+9)

using the formula:

( 3x + 7 )(5x+9)

15x²+27x+35x+63

15x² + 62x + 63

Stevynleng88idn

Answer:

D. 15x^2 + 62x +63

Step-by-step explanation:

Area of rectangle = L x W

L = 3x + 7 ; W = 5x + 9

=> A = (3x + 7) x (5x +9) = 15x^2 + 62x +63

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