Algebra Unit 2 Review

-5m + 21 = 6m - 56

• m = 77

• m = 7

• m = 1/7

• m = -7

7(2 - y) = 3(y + 2)

• No solution

• All real numbers

• y = 5/4

• y = 4/5

8(4 - 2n) = -16n + 16

• n = 32

• n = 16

• no solution

• all real numbers (infinite solutions)

4(4 - 4n) = -16n + 16

• all real numbers (infinite solutions)

• no solution

• n = 16

• n = -16

4(5 + 2t) < 9(2t + 2)

• 5 < t

• 5 > t

• 1/5 < t

• 1/5 > t

 $0.42h\ +\ 3\ \le\ 0.6h\ -\ 0.78$  

•  $21\ \le\ h$  

•  $21\ \ge\ h$  

•  $3.5\ \le\ h$  

•  $3.5\ \ge\ h$  

A tv that originally costs $422 is on sale for $346.04. What is the approximate discount rounded to the nearest percent?

• 122%

• 82%

• 18%

• 1.3%

If you bought dinner for $36.20 and received a 20% discount, what was the cost of the dinner before the discount was applied?

• $45.25

• $43.44

• $65.16

• $7.24

Bobby has $75 and is making $40 each week. Cathy has $150 and is making $25 each week. In how many weeks will Bobby and Cathy have the same amount or money?

• no solution

• 3 weeks

• 4 weeks

• 5 weeks

There are two competing cell phone companies: Horizon and TA&A. Horizon costs $30 per month and $0.35 per minute of phone use. TA&A costs $50 per month and $0.10 per minute of phone use. Which equation represents when the plans will be equal in cost for one month of service?

• 50 + 0.35m = 30 + 0.10m

• 30 + 0.35m = 50 + 0.10m

• 0.35m - 50 = 0.10m - 30

• 0.35m - 30 = 0.10m - 50