SOLUTION: if a 1lb package cost $1 to ship and an additional .30 for each lb. how much would a $7 package cost to ship? thanks.

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Question 145307: if a 1lb package cost $1 to ship and an additional .30 for each lb. how much would a $7 package cost to ship?
thanks.
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
You must mean: "How much would a 7 lb package
cost to ship?"
Let w = number of pounds per package
Let C = cost to ship package
Here's the general formula:
C+=+1+%2B+.3%28w+-+1%29
C+=+1+%2B+.3%287+-+1%29
C+=+1+%2B+1.8
C+=+2.8
A 7 lb package would cost $2.80 to ship