Mark has a $100 gift card to buy apps for his smartphone. Each week, he buys one new app for $4.99. Write an equation that relates the amount left on the card, y, over time, x. Then graph your equation.

step-by-step explanation:

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step-by-step explanation:

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just keep asking questions until you have a better understanding.

step-by-step explanation:

answer:   expression= p+p*d%

price reduction + sale price = $625

sale price: $p+$p*d%

where d% is the percentage of discount

step-by-step explanation:

original price = p

price went down by $150 price reduction $p*d%

sale price= $ 475

therefore the price before sale is: $625

and the expression that shows the price before sale is: p+p*d%