vikasp99 wrote:

Larry’s Lawn Service charges $w/hour for the first x hours of grass trimming, then w + 2 dollars for every hour of work over x hours. How much more will a homeowner be charged for a grass trimming job that took z hours if z > x than for a job which took only w hours if x < w < z?

A. x(z + w)

B. (w + 2) – zx

C. (w + 2) (z – w)

D. (xw + 2) – (z – w)

E. w(x + z) + x

Assume some values. Since x < w < z, assume x = 1, w = 2 and z = 3.

So the charge is $2 per hour for the first 1 hr. Thereafter, it is $4 per hour.

Charge for z (= 3) hrs = 2 + 4 + 4 = $10

Charge for w (= 2 ) hrs = 2 + 4 = $6

A homeowner will be charged $10 - $6 = $4 extra.

The option that gives us $4 will be the answer.

Answer (C)

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Karishma

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