Solve the problem.A merchant has coffee worth $40 a pound that she wishes to mix with 30 pounds of coffee worth $70 a pound to get a mixture that can be sold for $60 a pound. How many pounds of the $40 coffee should be used?
A. 7.5 lb
B. 15 lb
C. 22.5 lb
D. 45 lb
Answer: B
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Solve the problem.Jarod is having a problem with rabbits getting into his vegetable garden, so he decides to fence it in. The length of the garden is 5 feet more than 6 times the width. He needs 122 feet of fencing to do the job. Find the length and width of the garden.
A. length: 47 feet; width: 7 feet
B. length: 59 feet; width: 9 feet
C. length: 53 feet; width: 8 feet
D. length: 105
feet; width: 16
feet
Solve the system of equations by graphing.2x - y = 3 y = 1 
A. (1, 2) B. (2, 1) C. (-2, -1) D. no solution
Find the area of the figure.
A. 720 m2 B. 774 m2 C. 990 m2 D. 792 m2
Evaluate the radical expression if it is a real number. Use a calculator to approximate irrational numbers to the nearest hundredth. If the expression is not a real number, so state.
A. 625
B. 5
C. 
D. not a real number