Solve the problem.A merchant has coffee worth $30 a pound that she wishes to mix with 80 pounds of coffee worth 
a pound to get a mixture that can be sold for 
a pound. How many pounds of the 
coffee should be used?
A. 40 pounds
B. 120 pounds
C. 60 pounds
D. 20 pounds
Answer: A
Mathematics
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? 108x
A. 
B. 
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D. 
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+ 
- 
- 
A. 20 B. 0 C. 16 D. -4
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The graph of a one-to-one function f is given. Sketch the graph of the inverse function f-1, on the same set of axes. Use a dashed line for the inverse.
A. 
B. 
C. 
D. 
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