Estimate the answer from the table or graph.The profit earnings for XYZ company are reported quarterly. The earnings as a percentage of the yearly earnings for 2012 are shown in the pie chart. If the earnings in the first quarter were $55,000, what were the earnings for the whole year?
A. $275,000
B. $27,500
C. $220,000
D. $110,000
Answer: C
Mathematics
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Translate the problem to a system of equations, then solve using matrices.A merchant has coffee worth $30 a pound that she wishes to mix with 50 pounds of coffee worth $90 a pound to get a mixture that can be sold for $40 a pound. How many pounds of the $30 coffee should be used?
A. 250 lb B. 300 lb C. 125 lb D. 150 lb
Mathematics
Simplify.
A. 
B. 
C. 
D. -y
Mathematics
Find the sum, if it exists.
A. 69 B. -2460 C. -732 D. Does not exist
Mathematics
Rationalize the denominator. Assume that all variables represent positive real numbers and that the denominator is not zero.
A. 
B. 
C. 
D. 
Mathematics