Question

The width of a rectangle measures (7a + 10b) centimeters, and its length

measures (9a + 5b) centimeters. Which expression represents the
perimeter, in centimeters, of the rectangle?

32a + 10 + 10

32a + 30

30b + 32a

16a + 15

Answer 1

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The answer is below

width = (7a + 10b) cm

length = (9a + 5b) cm

Perimeter = 2(width + length)

= 2(7a+10b) + (9a+5b)

= 2(7a+10b + 9a+5b)

= 2(16a+15b)

= (32a+30b) cm