The width of ben's rectangular family room is 3ft less than the length. The perimeter is 70 ft. Which equation can be used to find the length L of the room? A.) 70=L-3 B.) 70=2L-3 C.) 70=2 (l-3) or D.) 70=2 (2L-3) ?

Question

Mathematics

Reese Keith

2 October, 13:30

The width of ben's rectangular family room is 3ft less than the length. The perimeter is 70 ft. Which equation can be used to find the length L of the room? A.) 70=L-3 B.) 70=2L-3 C.) 70=2 (l-3) or D.) 70=2 (2L-3) ?

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Answers (1)

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Lara Baldwin · Answer 1

This can be solved by establishing a system of equation, since

W = L - 3

And the perimeter is

2w + 2L = 70

Substituting the w in the second equation

2 (L-3) + 2L = 70

4L = 70 + 6

4L = 76

L = 19 ft

W = 16 ft