Math Quiz

A grocery store charges $0.75 per donut. Which equation can be used to find c, the total cost, in dollars, to buy d donuts?

• A. c = 0.75 + d

• B. c = 0.75d

• C. d = 0.75 + c

• D. d = 0.75c

Harrison reads 15 minutes per day for a project. The total number of minutes Harrison reads for the project is proportional to the number of days since he started the project. The equation shown represents the total number of minutes Harrison has read since he started the project: y = 15x. What does x represent in the equation?

• A. The number of days Harrison has read since he started the project

• B. The number of minutes Harrison reads per day for the project

• C. The total number of pages Harrison has read since he started the project

• D. The total number of minutes Harrison reads for a certain number of days for the project.

A community center is offering a discount on swimming passes. The regular cost for a swimming pass is $6.00. Jake, Liza, and Manuel each buy a swimming pass at the community center. After the discount, the total cost for the three passes is $14.40. What is the discount the community center is offering?

• A. 20%

• B. 42%

• C. 71%

• D. 80%

Leon is buying a bicycle. The regular price of the bicycle is x dollars. The bicycle is on sale for 20% off. He has to pay 5% sales tax on the sale price of the bicycle. To represent his total cost, Leon writes the expression shown: 1.05(x – 0.2x). Which expression also represents Leon's total cost?

• 0.79x

• 0.84x

• 0.85x

• 0.21x

Which expression is equivalent to –6x + 7.5?

• –3(2x – 2.5)

• –3(2x + 2.5)

• –3(2x – 7.5)

• –3(2x + 7.5)

Which expression is equivalent to 2.5(x – 1) + 4.5(–x – 2)?

• –2x – 11.5

• –2x + 11.5

• 7x – 11.5

• 7x + 11.5

Nell writes the expression (3.6x + 6) – 4. She rewrites the expression using the associative property. Which expression could Nell have written using the associative property?

• 5.6x

• 9.6x – 4

• 3.6x + (6 – 4)

• 3.6(x + 6) – 4

Points P and Q are plotted on the number line. Which expression represents the distance between points P and Q?

• |−8 − (−6)|

• |−8 − 6|

• |8 − 6|

• |6 − 8|

The number line shows the locations of points P, Q, R, and S. Which points have a distance of 5 units between them?

• point P and point S

• point Q and point R

• point Q and point S

• point R and point S

Last year, Ted's salary was $42,000. He donated 1/25 of last year's salary to charity. How much did Ted earn last year after his donation?

• $31,500

• $40,320

• $43,680

• $52,500