Answers Pre-Algebra - Gruber 2025Addition and Subtraction Equations

Multiplication and Division Equations Answers

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Pablo created the bar model and equation after paying a $9.79 lunch bill with a $20 bill. What is the value of c, and what does it represent in this problem?

The value is $10.21, and it shows the cost of Pablo’s lunch.

The value is $29.79, and it shows the cost of Pablo’s lunch.

The value is $10.21, and it shows the change Pablo received.

The value is $29.79, and it shows the change Pablo received.

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How can be solved for x in one step?

Add 3.7 to both sides.

Add 5 to both sides.

Subtract 3.7 from both sides

Subtract 5 from both sides

Jalisa earned $71.25 today babysitting, which is $22.50 more than she earned babysitting yesterday. The equation can be used to represent this situation, where d is the amount Jalisa earned babysitting yesterday. Which is an equivalent equation that can be used to find the amount Jalisa earned babysitting yesterday?

71.25 minus 22.50 = d

71.25 + 22.50 = d

d + 71.25 = 22.50

d minus 22.50 = 71.25

Cedric and Insha solved the same equation using the calculations below. Cedric’s WorkInsha’s WorkWhich statement is true about their work?

Cedric is correct because he used the inverse of subtraction and added 4.5.

Cedric is incorrect because he should have subtracted 4.5 from both sides instead of adding.

Insha is correct because she added the opposite if 4.5, which is , to both sides.

Insha is incorrect because she did not add correctly.

Kala bought two types of cheese at a deli. She bought 0.50 pound of American cheese and 1.25 pounds of Swiss cheese. The bar diagram and equation below represent Kala’s purchase, where p represents the total number of pounds of cheese she bought. What is the total number of pounds of cheese Kala bought?

0.75

1.20

1.30

1.75

A leak in a pool causes the height of the water to decrease by 0.25 foot over 2 hours. After the leak is fixed, the height of the water is 4.75 feet. The equation can be used to find x, the original height of the water in a pool. What was the original height of the water in the pool in feet?

4.5

5.0

6.5

7.0

Which of the following equations are equivalent? Select three options.

2 + x = 5

x + 1 = 4

9 + x = 6

x + (negative 4) = 7

Negative 5 + x = negative 2

Emma buys yards of blue fabric and some yellow fabric at a store. She buys a total of yards of fabric. The equation can be used to represent this situation, where y is the number of yards of yellow fabric she buys. How much yellow fabric does she buy?