Answer:
16
Step-by-step explanation:
Simply plug in 2 for a, then 6 for b and substitute
(2+6)2
Then do order of operations to simplify PEMDAS
First what's inside the parenthesis
(8)2
Then multiply
16.
Assuming f(x) is the cost and X is the number of months.
f(x)=2x+40
2/5 because 10/10 minus 6/10 equals 4/10 which reduces to 2/5