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anonymous
 one year ago
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anonymous
 one year ago
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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Let P(y) represent the final cost of the DVD,

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0If you have a discount of 12% off, that is \[y \times (10.12)\]. Correct?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.012% off means that you pay only 88% of the original cost.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Now, let's write the tax added cost. 3% tax means: \[y \times (1 + 0.03)\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The expression means that you need to pay an additional 3% on top of your original cost.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Let's combine the expressions together.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[P(y) = (y \times (10.12)) \times (1+0.03) = y \times 0.88 \times 1.03\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0First of all, you cannot subtract 0.03y. You are paying tax, not getting a discount.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0You can subtract the 0.12y as that is your discount.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yes, your signs are mixed up.
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