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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