Homework Explained - Math Practice 101

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Chapter 5: Writing Linear Equations; Mixed Review

Selected Response

• Question 1

An hourglass is turned over with the top part filled with sand. After 3 minutes, there are 855 mL of sand in the top half. After 10 minutes, there are 750 mL of sand in the top half. Which equation represents this situation?

• $$\text{y} = 285\text{x}$$
• $$\text{y} = -10.5\text{x} + 900$$
• $$\text{y} = -15\text{x} + 900$$
• $$\text{y} = 75\text{x}$$
• Question 2

Which graph shows a linear relationship?

• A
• B
• C
• D
• Question 3

What are the slope and y-intercept of the relationship shown in the table?

• slope = 0.05, y-intercept = 1,500
• slope = 0.5, y-intercept = 1,500
• slope = 0.05, y-intercept = 2,000
• slope = 0.5, y-intercept = 2,000
• Question 4

Which is the sum of $$3.15\times10^7 + 9.3\times10^6$$? Write your answer in scientific notation.

• $$4.08 \times 10^7$$
• $$4.08 \times 10^6$$
• $$0.408 \times 10^8$$
• $$40.8 \times 10^6$$

• Question 5

Franklin’s faucet was leaking, so he put a bucket underneath to catch the water. After a while, Franklin started keeping track of how much water was in the bucket. His data is in the table below.

a. Is the relationship linear or nonlinear?

• Question 5

b. Write the equation for the relationship.

• Type below:
• Question 5

c. Predict how much water will be in the bucket after 14 hours if Franklin doesn’t stop the leak.

•  quarts

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