A rectangle has an area of 72 square units. The width of the rectangle is 9 units. The length of the rectangle is 2x + 4. What is the rectangle's length? A) 6, B) 7, C) 8 D) 9

Question

Niko Murphy

Mathematics

11 March, 07:10

A rectangle has an area of 72 square units. The width of the rectangle is 9 units. The length of the rectangle is 2x + 4. What is the rectangle's length? A) 6, B) 7, C) 8 D) 9

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Answers (1)

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Marques Woodard · Answer 1

A = L•W

72 = 9 • (2x + 4)

72 = 9 (2x + 4)

72 = 18x + 36

72 - 36 = 18x + 36 - 36

36 = 18x

36/18 = 18x/18

2 = X

L = 2x + 4

L = 2 (2) + 4

L = 4 + 4

L = 8.

The rectangle's length is C. 8 units.