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3 December, 12:33

K2=225

A) k=13

B) k = (-13)

C) k=15

D) k = (-15)

+4
Answers (1)
  1. 3 December, 12:56
    0
    This is basically a direct proportion equation,

    y = kx

    in this case, it's:

    225 = k2

    to get k, we have to divide 225 by 2 hence:

    112.5 = k

    k = 112.5

    Since the answer match none of the multiple choice you provided.

    You must've written the question wrongly, if you were writing to the power of 2, it means u should have written k^2 = 225.

    In this case, it's not a direct proportion question and it's a case of simple algebraic equation.

    k^2 = 225

    Then

    k = + / - 15.

    Hence the answer is both C and D
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