Answer:
s=3
Step-by-step explanation:
27=9•s
Divide each side by 9
27/9 = 9s/9
3 =s
Answer:
1/4
Step-by-step explanation:
1/2 = 2/4
3/4-2/4=1/4
Answer: 21
Step-by-step explanation:

Substitute the value of z into the expression:

Answer:
Each CD was $15.30.
Step-by-step explanation:
97.20-5.40= 91.80 => 91.80/6= 15.30
Divide the number & Multiply