math help??? PLEASE

Question

Question 1. what is the value of a^2(unit2) + 3b (divided) c

when a=3 , b=8 , c=2 ?

Question 2. what is the value of the expression when z=7 ?

3z-3?

a.12

b.18

c.21

d.34

would this answer be d??

Answer 1

(3^2 x 2 + 3(8))/2 = 42/2 = 21 c is correct

2nd separate problem, 3(7)-3 = 18. so b is correct