Anonymous

a salesperson's commission is k percent of the selling price of a car. which of the following represents the commission, in dollars, on 2 cars that sold for \$14,000 each? a)280k b)7,000k c)28,000k d) 1400/100 + 2k e) 28000+k/100 thanks ahead of time for your help. i love your blog!

This #20 is a big ol’ plug in question

Say k = 10. That means the salesperson’s commission is 10% of his sales.

He sells 2 cars, for \$14,000 each, so his commission will be 10% of \$28,000 in sales:

That’s \$2,800 in commission.
Just drop 10 in for k in all the answers, and see which ones gives you \$2,800:
(A) 280(10) = 2,800
(B) 7,000(10) = 70,000
(C) 28,000(10) = 280,000
(D) 14,000/[100 + 2(10)] =116.666…
(E) [28,000 + 10]/100 = 280.1
Only (A) works!