Find the value of the exponential expression.
2
A. 
B. 2
C. 
D. 
Answer: D
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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
Solve.Erika spent 
hr on her computer visiting the history channel and the discovery channel websites. She spent 
hr at the history channel website. How many hours did she spend at the discovery channel website?
A. 
hr
B. 
hr
C. 
hr
D. 
hr
Identify the greatest common factor.x2 + 4x
A. x B. 4x C. x2 D. No common factor
Evaluate the algebraic expression for the given values of the variables.2x + 7y for x = 3 and y = 7
A. 55 B. 27 C. 35 D. 63