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29 April, 10:55

The length of a rectangle is 5 inches more than the width. The perimeter is 38 inches. Find the length and the width.

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  1. 29 April, 10:57
    0
    38=2x+2x+10

    28=4x

    7=x

    Width is 7

    Length is 12
  2. 29 April, 11:24
    0
    The formula for perimeter is P=2L+2W (L is length and W is width).

    If the length is 5 inches more than the width, that means L=W+5

    Now we can just plug that into the formula, so that gives us P=2 (W+5) + 2W

    Simplify that, which equals P=2W+10+2W

    Combine like terms: P=4W+10

    Since we know the perimeter, let's plug n 38 as P

    Now we have 38=4W+10

    Subtract 10, giving you 28=4W

    Now divide by 4, you get 7=W

    So the length is 12 inches and the width is 7 inches
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