For exercises 1 and 2, translate each phrase into an algebraic expression.
1. the difference of a number and sixteen (1 point)
A.n + 16
B.n – 16
C.16n
D.n/16
2. five times k (1 point)
A.5k
B.k + 5
C.k ÷ 5
D.5 – k
For exercises 3 and 4, evaluate each expression when s = 9 and t = 12.
3. 3(3t + s) (1 point)
A.9
B.24
C.45
D.135
4. 2s – t (1 point)
A.–6
B.6
C.15
D.30