Solve the problem.The manager of a coffee shop has one type of coffee that sells for $9 per pound and another type that sells for $13 per pound. The manager wishes to mix 70 pounds of the $13 coffee to get a mixture that will sell for $10 per pound. How many pounds of the $9 coffee should be used?
A. 140 lb
B. 105 lb
C. 280 lb
D. 210 lb
Answer: D
Mathematics
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A. 
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and 
. If M is the midpoint of 
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What will be an ideal response?
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A. 18.0 hr B. 4.0 hr C. 5.6 hr D. 3.1 hr
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Solve the equation.x4 - 13x2 - 48 = 0
A. {- 
, 
, -4i, 4i}
B. {4, i
}
C. {-4, 4, -i
, i
}
D. {-16, 3}
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