1. what is the sum of p and q? p(x) = 3x – 11 q(x) = 4 – 4x a) (p + q)(x) = –x – 7 b) (p + q)(x) = –x + 15 c) (p + q)(x) = 7x – 7 d) (p + q)(x) = 7x + 15 2. what is the difference of t and v? t(x) = 7x – 2 v(x) = x – 9 a) (t – v)(x) = –6x – 11 b) (t – v)(x) = –6x – 7 c) (t – v)(x) = 6x + 7 d) (t – v)(x) = 6x – 11 3. nina makes and sells necklaces. for n necklaces, her revenue function is r(n) = 11.75n and her cost function is c(n) = 8.9 + 1.2n. which function is nina’s profit function? a) p(n) = 10.55n – 8.9 b) p(n) = 12.95n – 8.9 c) p(n) = 12.95n + 8.9 d) p(n) = 14.1n + 8.9