The length of a rectangle is given as 3x-2. The width of the rectangle is given as x+3. If the perimeter is measured as 46 centimeters, what

Question

The length of a rectangle is given as 3x-2. The width of the rectangle is given as x+3. If the perimeter is measured as 46 centimeters, what is the length of the rectangle in centimeters?

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Tryphena 3 months 2021-08-28T08:29:46+00:00 1 Answers 0 views 0

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    2021-08-28T08:30:58+00:00

    Answer:

    14.5 cm

    Step-by-step explanation:

    L = 3x – 2

    W = x + 3

    so the perimeter is 2 lengths + 2 widths = 2(3x-2) + 2(x+3) = 6x-4 + 2x + 6

    so 8x + 2 = 46

    therefore 8x = 46 – 2

    so 8x = 44

    so   x = 44/8 = 5.5

    so if the length is 3x – 2  

    the length must be  3(5.5) -2

    or 16.5 -2  which equals  14.5 centimeters

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )