Question

100 POINTS If (p−q)/2 =3 and rp−rq=12, then r= (A) −1 (B) 1 (C) 2 (D) 4 (E) It cannot be determined from the information given

Answer 1

r = 2 (answer C)

Explanation:

Given: (p - q)/2 = 3, so (p - q) = 6

Next, rp - rq = 12 can be rewritten as r(p - q) = 12, or r(6) = 12

Then r must be 2: r = 2 (answer C)