# Math

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Photography reprints cost \$0.52 each at a local photo shop. Through the mail, they cost \$0.44 each plus \$1.20 postage and handling. How many reprints must a customer purchase to make it less expensive to use mail order?

• Math -

you have two functions:

cost1 = .52x
cost2 = .44x + 1.2 , where x is the number of prints

the costs are equal when
cost 1 = cost2 , or
.52x = .44x + 1.2

solving this you get x = 15

so try 16 in each equation to see which is the cheaper.

• Math -

So basically the answer would be x>15? Does this make sense considering that 16 is greater than 15? Thanks for the help!

• Math -

yes, you got it

• Math -

Thanks! Take care! :)

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