The width of a rectangle is the length minus 4 units. The area of the rectangle is 21 units. What is the width, in units, of the recta

Question

The width of a rectangle is the length minus 4 units. The area of the rectangle is 21
units. What is the width, in units, of the rectangle?

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Claire 2 weeks 2021-09-12T23:34:06+00:00 2 Answers 0

Answers ( )

    0
    2021-09-12T23:35:39+00:00

    Answer:

    3 is the answer…Only stating facs so there you go, hope It helped 🙂

    Step-by-step explanation:

    3333333333333333333333333

    0
    2021-09-12T23:35:45+00:00

    Answer:

    Length=7 units\\Width=3 units

    Step-by-step explanation:

    let the Length= L

    Width(W)=L-4\\Area=21Units^2

          Area of a rectangle= Length* Width

                                     21=L*(L-4)

                                     L^2-4L=21\\\\L^2-4L-21=0\\\\L^2+3L-7L-21=0\\\\L(L+3)-7(L+3)=0\\\\(L+3)(L-7)=0\\\\L=-3   \\OR\\ L=7\\\\

    The length cannot be negative so, Length = 7 units

    Width=Length-4

    Width=7-4= 3 units

                                   Length=7 units\\Width=3 units

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45:7+7-4:2-5:5*4+35:2 =? ( )