A local Chinese restaurant sells combination meals for $9.50 a piece. If the cost of an order is proportional to the number of meals ordered, how much is the delivery charge?
a.
$2 per order
b.
$3 per order
c.
$3 for the first and $2 for each additional meal
d.
$2 per meal
Let the number of meals ordered and the number of orders = M
a) $2 M + $9.50 M
= $11.50M
b) $3 M + $9.50 M
= $12.50M
c) $3 M + $2(M-1) + $9.50 M
= $(2(M-1) + 12.50) M
d) $2 M + $9.50 M
= $11.50M