Ch 2 AIR Review

Trent plants a sunflower that is 6 inches tall. The sunflower is expected to grow at an average rate of 1.5 inches per day during the next month.

Create an equation that Trent can use to find the number of days, x, it will take to grow to a height of 45 inches.

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A.CED.1

A factory has two assembly lines, M and N, that make the same toy. On Monday only assembly line M was functioning, and it made 900 toys.

On Tuesday, both assembly lines were functioning for the same amount of time. Line M made 300 toys per hour and Line N made 480 toys per hour. Line N made as many toys on Tuesday as Line M did over both days.

Write an equation that can be used to find the number of hours, t, that the assembly lines were functioning on Tuesday.

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A.CED.1

Stephanie adds pennies, nickels, and quarters to a scale until the mass of the combined coins is 75 grams. Each penny has a mass of 2.5 grams, each nickel is 5 grams, and the quarters are 5.7 grams.

Create an equation to model this situation where x is the number of pennies, y is the number of nickels, and z is the number of quarters Stephanie can put on the scale so the mass of the combined coins is 75 grams.

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A.CED.2

Chad buys pineapples , watermelons, and a bag of grapes for a fruit salad. He spends a total of $29.68 on the fruit salad. Pineapples cost $2.15 each, watermelons cost $3.75 each. The bag of grapes costs $4.48.

Create an equation to model the situation, where p represents the number of pineapples, and w represents the number of watermelons Chad can purchase.

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A.CED.3

An equation is given:

y = 3x +c

Create an equivalent equation by solving for x in terms of y and c. Hint: use parentheses if need to write bottom or top of fraction.

x = ______________

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A.CED.4

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A.CED.4

Emerson has $120. Each week, he saves an additional $15.

Write a function f(x) that models the total amount of money Emerson has after x weeks.

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F.LE.2

Jim paid a gym membership fee of $50, plus $20 per month.  Jim has paid a total of $290 to the gym.  Which equation matches this situation?

• 50 + 20m = 290

• 20 + 50m = 290

• 50 + 20 = m

• 50m - 20 = 290

Nancy won a certain number of pieces of gum playing the bean bag toss at the county fair. At school she gave 21 away to her classmates. She only has 5 remaining. How many did she give away? Write an equation to solve this problem using g as your variable.

• g/21=5

• g-21=5

• g-5=21

• g+5=21