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16 February, 06:54

89. If x, y, and z are numbers such that xy + xz = 100, what is the value of x/5 (3y + 3z) + 10?

A. 60 + 2x

B. 62

C. 70

D. 130

E. 130 + 2x

+1
Answers (1)
  1. 16 February, 07:00
    0
    Hello,

    xy+xz=100==>x (y+z) = 100

    x/5 * (3y+3z) + 10=3/5 * (x (y+z)) + 10=3/5*100+10=70

    Answer C
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