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Laabri

Unit 2 Retake Big Idea 1&2 Expressions

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Last updated almost 2 years ago
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1.

Which expression below is equivalent to the following expression?

20 + 8y - 9y - 21

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2.

Below is the configuration of a work desk in a 7th grade classroom. All units are in inches.

Find the perimeter of the work desk.

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3.

Which of the following expressions ARE equivalent to the expression?

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4.

For which value of a will the equation 4x – 8 = 4x – a have an infinite number of solutions?

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5.

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6.

Solve for x. (Answer must be a fraction)

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7.

Charlie’s house needs to be painted. Three paint companies wrote expressions to represent their hourly rates where h represents the number of hours they work at his house.

Pam’s Paints 30.50h + 120

Mack’s Murals & More 5(6.10h + 25)

Hettie’s House Painters 25.50h + 150

How many hours will Mack and Hattie have to paint to charge the same amount?

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8.

Jenny solved the equation -3 - (5x - 6) = -2x + 9. Her work is shown below.

Identify and explain Jenny’s error in solving the equation.