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13. Train A leaves a station traveling at 48 kilometers

per hour. Four hours later, Train B leaves the same

station traveling in the same direction at 68

kilometers per hour. What equation can you use to

find the time t in hours that it took train B to catch up

with Train A, and what is the value of t?

14. Solve the equation 473 + 5n =14.

15. Solve =1 + m.

16. Make a stem-and-leaf plot for this set of data: 61,

64, 82, 62, 70, 63, 76, 85, 90, 78, 96, 60, 74, 81, 93.

17. Solve 15x3 = 3(5x1).

18. Solve the inequality 144z 5?

20. Solve the inequality3(r5) + 7 28.

21. Draw a graph that represents 8 + y > 1.

22. What is the solution of3|a7| =42?

23. Solve the inequality10 + 125x 100(0.25 + 1).

24. Which number is a solution of the inequality 2(3

x) >4?

25. Solve the equation3|x3| = 9.

26. Solve the inequality 2(x3)

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1. Solve + 14 = 0.

CORRECT: z = 28

2. Solve = for x.

CORRECT: x =

3. Solve x = .

CORRECT: x =4. Solve the equation 48 =6(x7).

CORRECT: x =1

5. Solve3x = .

CORRECT: x =

6. Solve the equation 4 = .

CORRECT: z = 367. Solve the equation 3x5 =2x + 7.

CORRECT: x =8. What equation can you use to solve thisproblem, and what is its solution?The cost of manufacturing halogen lightsincludes $1,250 per day to pay for overheadcosts, and $12 per day for labor and

materials. The halogen lights sell for $12each. What is the fewest number of halogenlights the company must sell in one day tobreak even?

CORRECT: 12h = 1250 + 12; h =105

9. Find the median: 5, 15, 28, 7, 10, 10, 27,10.

CORRECT: 10

10. John and his friend order lunch at a localsandwich shop. They each order a soft drinkthat costs $1.65. John orders a whole hamsandwich and his friend orders half of a hamsandwich. Their total bill is $12.54. Whatequation can you use to find the cost c of asandwich, and what is the value of c?

CORRECT: 2(1.65) + c + c =12.54; c = 6.16

11. Solve ax + by = c for y.

CORRECT: y =

12. Solve x = .

CORRECT: x =13. Train A leaves a station traveling at 48kilometers per hour. Four hours later, TrainB leaves the same station traveling in thesame direction at 68 kilometers per hour.What equation can you use to find the time tin hours that it took train B to catch up withTrain A, and what is the value of t?

CORRECT: 48(t + 4) = 68t; t = 9.6hours

14. Solve the equation 473 + 5n =14.

CORRECT: n = 11

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15. Solve =1 + m.

CORRECT: = m

16. Make a stem-and-leaf plot for this set ofdata: 61, 64, 82, 62, 70, 63, 76, 85, 90, 78,96, 60, 74, 81, 93.

CORRECT:6|4 = 64

17. Solve 15x3 = 3(5x1).

CORRECT: 3=318. Solve the inequality 144z 1?

CORRECT:

22. What is the solution of3|a7| =42?

CORRECT: a =7 or a = 21

23. Solve the inequality10 + 125x 100(0.25 + 1).

CORRECT: x 1.08

24. Which number is a solution of theinequality 2(3x) >4?

CORRECT: 025. Solve the equation3|x3| = 9.

CORRECT: no solution26. Solve the inequality 2(x3) x