Computations and Algebraic Relationships

7.4A

Cheddar cheese costs $4.25 per pound. Which equation best represents y, the total cost of x pounds of cheddar cheese?

• x = 4.25 + y

• x = 4.25y

• y = 4.25 + x

• y = 4.25x

7.11A

What is the solution set for

-4x - 10 ≤ 2 ?

• x ≤ -3

• x ≥ -3

• x ≤ 2

• x ≥ 2

7.4D

The ratio of boys to girls in Ms. Cunningham's class is 2 to 3. There are 18 girls in the class. What is the total number of students in Ms. Cunningham's class?

• 12

• 30

• 45

• 27

7.7A

• 
• 
• 
• 

7.3B

• 100

• 33

• 25

• 20

7.7A

A fish is swimming at a constant rate toward the ocean floor. The equation y = -7x - 3 can be used to represent this situation, where y is the depth of the first in meters below sea level and x is the number of seconds the fish has been swimming.

Which statement best describes the depth of the fish, given this equation?

• From a starting position of 7 meters below sea level, the fish is descending 3 meters per second.

• From a starting position of 7 meters below sea level, the fish is ascending 3 meters per second.

• From a starting position of 3 meters below sea level, the fish is descending 7 meters per second.

• From a starting position of 3 meters below sea level, the fish is ascending 7 meters per second.

7.4D

Russell has a collection of 1,200 pennies. Of these pennies, 25% are dated before 1980, 35% are dated from 1980 to 2000, and the rest are dated after 2000.

How many pennies in Russell's collection are dated after 2000?

• 480

• 720

• 40

• 60

7.11A

• x = 3

• x = 15

• x = 5

• x = 1

7.3B

Marsha gave the cashier $20 to pay for 3 pairs of socks. The cashier gave her $5.03 in change. Each pair of socks cost the same amount.

What is the cost in dollars and cents for each pair of socks?

• $6.67

• $4.90

• $4.99

• $5.03

7.4A

• Layla read 2 books in the first 3 months she was a member of the book club.

• Layla read 3 books in the first 2 months she was a member of the book club.

• Layla read 3 books in the first 4 months she was a member of the book club.

• Layla read 4 books in the first 3 months she was a member of the book club.