SOLUTION: Sorry to submit problem again, but has been over an hour. Problem: Went to Staples to have cards printed. They charge a base fee of $15 and 12 cent each card printed. Prints were

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Question 1062095: Sorry to submit problem again, but has been over an hour. Problem: Went to Staples to have cards printed. They charge a base fee of $15 and 12 cent each card printed. Prints were ordered and paid $45 before taxes. How many cards were ordered to be printed. Thanks for your time and help
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39626) About Me  (Show Source):
You can put this solution on YOUR website!
Just solved a minute ago. Described the analysis there.
y=mx%2Bb

If y is for the cost,
y=0.0012x%2B15-----consistent with your previous posted question.
and just solve for x.

See the other solution posting response.


--
Fixed result in earlier response:
x=25000, according to what you previously posted.

Answer by MathTherapy(10556) About Me  (Show Source):
You can put this solution on YOUR website!

Sorry to submit problem again, but has been over an hour. Problem: Went to Staples to have cards printed. They charge a base fee of $15 and 12 cent each card printed. Prints were ordered and paid $45 before taxes. How many cards were ordered to be printed. Thanks for your time and help
With x being number of cards printed, we get: f(x) = .12x + 15

45 = .12x + 15 ------- Replacing f(x) with 45 

45 - 15 = .12x

30 = .12x

Number of cards printed = highlight_green%28matrix%281%2C3%2C+30%2F.12%2C+or%2C+250%29%29