SOLUTION: the formula of the perimeter P of a rectangle is P = 2L+2w where L is the length and w is the width. Solve the formula for w. Then find the width of a rectangular table top whose p

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Question 697738: the formula of the perimeter P of a rectangle is P = 2L+2w where L is the length and w is the width. Solve the formula for w. Then find the width of a rectangular table top whose perimeter is 25 feet and whose length is 7 feet.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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the formula of the perimeter P of a rectangle is P = 2L+2w where L is the length and w is the width.
Solve the formula for w.
2L + 2W = P
Divide by 2
L + W = P%2F2
Subtract L from both sides
W = P%2F2 - L
:
Then find the width of a rectangular table top whose perimeter is 25 feet and whose length is 7 feet.
W = 25%2F2 - 7
W = 12.5 - 7
W = 5.5 ft is the width
:
:
Check this
P = 2(7) + 2(5.5)
P = 14 + 11
P = 25 ft