Adding and Subtracting Expressions

Question 1

Gabriel is at the grocery store, and wants to figure out his total cost before he gets to the register. He bought 2.5 pounds of apples that are x dollars a pound and 2 bags of lettuce for y dollars each. Which expressions would represent his total cost? Check all that apply.

Revolt · Accepted Answer

B: x + 1.5x+ 2y; C: 2y + 2.5x

Question 2

Gabriel has $30 to pay for the groceries. What simplified expression would represent the amount of change he should receive?

Revolt · Accepted Answer

D: 32 – 2.5x – 2y

Question 3

One week, Gabriel bought 2 bags of beans and 3 bags of rice. The next week, he bought 4 bags of beans and 1 bag of rice. Let b represent the cost of each bag of beans and r represent the cost of each bag of rice. Simplify the expression for the total cost, shown below.(2b + 3r) + (4b+ r)

Revolt · Accepted Answer

D: 6b + 4r

Question 4

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. His sister states that the expression should be x + x + 0.5x + y + y – 2. Who is correct? Explain.

Revolt · Accepted Answer

Answer

Question 5

Gabriel remembers he has a coupon for $2 off his bill. Which expression gives the new amount he will pay?

Revolt · Accepted Answer

D: 2y + 2.5x -2

Question 6

What is this expression after simplifying?

Revolt · Accepted Answer

B: 4b + 3r

Question 7

Check all that you included in your response.

Revolt · Accepted Answer

A: Subtract the entire quantity.; B: Distribute the negative sign.; C: The 2 gets added to 30.

Question 8

Check all that you included in your response.

Revolt · Accepted Answer

A: They are both right.; B: Gabriel’s sister can combine like terms.; C: They are equivalent expressions.

Adding and Subtracting Expressions Answers

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