7th Grade Math Fall Semester Exam Review

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-46.5

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Using the rule y = 4x - 1, find the value of y when x is 5.

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y = 19

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If a game system costs $290 and the sales tax is 7%, what is the total cost?

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$310.30

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Back

6 pizzas per minute

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The price of a cell phone was reduced from $450 to $225. What is the percentage reduction?

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50%

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What is the formula for calculating sales tax?

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Sales Tax = Price × Tax Rate

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How do you calculate the unit rate?

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Unit Rate = Total Quantity ÷ Total Time

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What is the formula for finding the percentage decrease?

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Percentage Decrease = (Original Price - New Price) ÷ Original Price × 100

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What is the value of y in the equation y = 4x - 1 when x = 0?

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y = -1

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6