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