Given matrix A, find the indicated minor or cofactor.Find the minor M21.A =
A. -1
B. 7
C. -7
D. 1
Answer: D
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Solve the problem.A merchant has coffee worth $2 a pound that she wishes to mix with 4 pounds of coffee worth $9 a pound to get a mixture that can be sold for $3 a pound. How many pounds of the $2 coffee should be used?
A. 28 lb B. 24 lb C. 12 lb D. 14 lb
Solve the problem.Kevin invested part of his $10,000 bonus in a certificate of deposit that paid 6% annual simple interest, and the remainder in a mutual fund that paid 11% annual simple interest. If his total interest for that year was $700, how much did Kevin invest in the mutual fund?
A. $1000 B. $2000 C. $8000 D. $3000
The graph of a one-to-one function f is given. Draw the graph of the inverse function f-1 as a dashed line or curve.f(x) = x3 + 2
A. 
B. 
Graph the numbers on the real number line.x > -7
A. 
B. 
C. 
D. 