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March 29, 2017

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The length of a rectangle is 6 cm more than four times the width. If the perimeter of the rectangle is 42 cm, what are its dimensions?

a. length = 18 cm; width = 3 cm
b. length = 18 cm; width = 9 cm
c. length = 6 cm; width = 9 cm
d. length = 3 cm; width = 18 cm

  • algebra - ,

    w = width
    4w + 6 = length

    P = 2w + 2L
    42 = 2w + 2(4w + 6)

    Solve for w

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