Solve the problem.A merchant has coffee worth $50 a pound that she wishes to mix with 40 pounds of coffee worth 
a pound to get a mixture that can be sold for $60 a pound. How many pounds of the $50 coffee should be used?
A. 120 pounds
B. 40 pounds
C. 60 pounds
D. 80 pounds
Answer: D
Mathematics
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Find the exact or approximate circumference of the circle, as indicated.Find the approximate circumference. Use 
for ?.
A. 104,104 in. B. 572 in. C. 1144 in. D. 286 in.
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Use algebraic and/or graphical methods to solve the inequality.2x3 + 9x2 - 27x - 54 > 0
A. -6 < x < - 
or x > 3
B. x < -6 or - 
< x < 3
C. x ? -6 or - 
? x ? 3
D. -6 ? x ? - 
or x ? 3
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Use the formula A = P(1 + rt) to find the indicated quantity.A = $16,400; r = 10%; 90 days. Find P.
A. $16,810 B. $16,400 C. $16,000 D. $400.00
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Simplify the expression. Assume all variables represent positive real numbers.
+ 7
+ 4
A. 52
B. 12
C. 11
D. 51
Mathematics