Solve each equation.Solve each problem.x+ 5
3=
x- 3
4z
8=
12
16
172 CHAPTER 2 Linear Equations and Inequalities in One Variable
13.Find the best buy. Give the unit price to
the nearest thousandth for that size.14.The distance between Milwaukee and
Boston is 1050 mi. On a certain map,
this distance is represented by 42 in. On
the same map, Seattle and Cincinnati
are 92 in. apart. What is the actual dis-
tance between Seattle and Cincinnati?PROCESSED
CHEESE SLICES
Size Price
8 oz $2.79
16 oz $4.99
32 oz $7.99
15.Carlos Periu invested some money at 3% simple interest and $6000 more than that
amount at 4.5% simple interest. After 1 yr, his total interest from the two accounts was
$870. How much did he invest at each rate?
16.Two cars leave from the same point, traveling in opposite directions. One travels at a con-
stant rate of 50 mph, while the other travels at a constant rate of 65 mph. How long will
it take for them to be 460 mi apart?Solve each inequality. Write the solution set in interval notation, and graph it.
- 19.Susan Jacobson has grades of 76 and 81 on her first two algebra tests. If she wants an
average of at least 80 after her third test, what score must she make on that test?
20.Write a short explanation of the additional (extra) rule that must be remembered when
solving an inequality (as opposed to solving an equation).
- 4 x+ 21 x- 32 Ú 4 x- 13 + 5 x 2 - 7 - 1063 x- 4 ... 14
- 19.Susan Jacobson has grades of 76 and 81 on her first two algebra tests. If she wants an
CUMULATIVE REVIEW EXERCISES
CHAPTERS 1–2
Perform each indicated operation.Translate from words to symbols. Use x as the variable.
3.The difference between half a number and 18
4.The quotient of 6 and 12 more than a number is 2.5.Trueor false?Perform each indicated operation.8.Find the value of when x=- 2 , y=- 4 , and z= 3.3 x^2 - y^3- 4 z
1 - 7 - 121 - 42 + 1 - 42
- 41921 - 22
- 32
8172 - 516 + 22
3 # 5 + 1
Ú 1
9
8
#^16
3,
5
8
5
6
+
1
4
-
7
15
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