Answer:
2x=140
x=70
Step-by-step explanation:
Answer:
C(x) = 7x + 10
Step-by-step explanation:
If the delivery charge is $10 for any number of board feet ordered.
If the delivery charge is $10 for each board feet ordered, the function would
be C(x) = (7 + 10)x = 17x
160 is 100% of 160, 480 is 4 times that. So 400%