Answer:
B
Step-by-step explanation:
5(2x+4)=30
10x+20=30
10x=10
x=1
a) 390
b)108
I hope this answer was helpfull for you
$10294.20
8550 increase 20.4% =
8550 × (1 + 20.4%) = 8550 × (1 + 0.204) = 10294.2