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Math

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Maria had a square piece of paper. She cut 3 inches off the length and 4 inches off the width. Now the paper has a surface area of 30 in2. Which equation would you use to find the dimensions of the original piece of paper?


A. x2 - 7x + 12 = 0
B. x2 - 7x - 18 = 0
c. x2 - 3x - 4 = 30
D. x2 + 3x + 4 = 30

  • Math - ,

    expand
    (x-3)(x-4) = 30 and see which matches

  • Math - ,

    evaluate r. 12Pr=1320

  • Math - ,

    evaluate r. if12Pr=1320

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