Solve the mixture problem.A merchant has coffee worth $5 a pound that she wishes to mix with 60 pounds of coffee worth $9 a pound to get a mixture worth $6 a pound. How many pounds of the $5 coffee should be used?
A. 90 lb
B. 180 lb
C. 240 lb
D. 120 lb
Answer: B
Mathematics
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Evaluate the integral.
A. 
[ sin 2x + cos 2x] + C
B. 
[2 e7x sin 2x + 7 cos 2x] + C
C. 
[2 sin 2x - 7 cos 2x] + C
D. 
[2 sin 2x + 7 cos 2x] + C
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Sketch the graph of the pair of functions. Use a dashed line for g(x).f(x) = x3 , g(x) = -x3 - 4
A. 
B. 
C. 
D. 
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Identify the number as prime or composite.73
A. Composite B. Prime
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Solve using the elimination method. x + y = -1x - y = -13
A. (7, 7) B. (-8, 7) C. (-1, -13) D. (-7, 6)
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