Solve the problem.Benjamin never has more than 21 hours free during the week. He is trying to make a weekly plan for dividing his free time between reading and working out. He wants to spend at least 8 hours per week reading. Write a system of inequalities to describe the situation. Let 
of time for reading and 
of time for working out.
A. x + y ? 21
x ? 8y
x ? 0
y ? 0
B. x + y ? 21
x ? 8y
x ? 0
y ? 0
C. x + y ? 21
x ? 8
y ? 0
D. x + y ? 21
y ? 8
x ? 0
Answer: C
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Solve the problem.Some values of linear functions f and g are listed in the table below. Find the solution of a system of two equations that describes the functions f and g. HINT: Use the linear regression and graphing functions on a calculator to find and graph equations of f and g.
A. (3.2, 58.7) B. (7.6, 44.8) C. (6.8, 44.2) D. (0.3, 73.7)
Solve the problem.A company manufactures three products. The graph shows the production from 1986 to 1996. What was the level of production when the production of B equaled the production of C?
A. 400,000 B. 700,000 C. 800,000 D. 500,000
Evaluate.62
A. -12 B. 12 C. -36 D. 36
Solve the problem using the information given in the table and the weighted-average inventory method. Round to the nearest cent.Calculate the average unit cost. 
A. $34.22 B. $26.09 C. $29.95 D. $149.73