IM: 7.5.9: Multiplying Rational Numbers (Practice) - Formative Staff | Library

Fill in the missing numbers in these equations

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-2\cdot(-4.5)=?

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(-8.7)\cdot(-10)=?

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(-7)\cdot?=14

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?\cdot(-10)=90

A weather station on the top of a mountain reports that the temperature is currently 0\degree C and has been falling at a constant rate of 3\degree C per hour. If it continues to fall at this rate, find each indicated temperature. Explain or show your reasoning.

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What will the temperature be in 2 hours?

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What will the temperature be in 5 hours?

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What will the temperature be in half an hour?

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What was the temperature 1 hour ago?

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What was the temperature 3 hours ago?

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What was the temperature 4.5 hours ago?

Find the value of each expression.

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\frac{1}{4}\cdot(-12)

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-\frac{1}{3}\cdot39

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(-\frac{4}{5})\cdot(-75)

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-\frac{2}{5}\cdot(-\frac{3}{4})

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\frac{8}{3}\cdot-42

To make a specific hair dye, a hair stylist uses a ratio of 1\frac{1}{8} oz of red tone, \frac{3}{4} oz of gray tone, and \frac{5}{8} oz of brown tone.

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If the stylist needs to make 20 oz of dye, how much of each dye color is needed?

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If the stylist needs to make 100 oz of dye, how much of each dye color is needed?

Here are the vertices of rectangle FROG: (-2,5),(-2,1),(6,5),(6,1).

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Find the perimeter of this rectangle. If you get stuck, try plotting the points on a coordinate plane.

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Find the area of the rectangle FROG.

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Here are the coordinates of rectangle PLAY: (-11,20),(-11,3),(-1,20),(-1,-3). Find the perimeter and area of this rectangle. See if you can figure out its side lengths without plotting the points.