Simplify the expression by using the order of operations.3 ? 
? 
÷ 4 ? 
+ 6
A. 30
B. 14
C. 72
D. 78
Answer: D
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Translate the problem to a system of equations, then solve using matrices.Mardi received an inheritance of $40,000. She invested part at 7% and deposited the remainder in tax-free bonds at 9%. Her total annual income from the investments was $3000. Find the amount invested at 7%.
A. $30,000 B. $15,000 C. $37,000 D. $29,000
Evaluate the improper integral.
A. 
B. 
C. 
D. 
Solve the following equation.
10x = 3200 a. 3.05 b. 3.5 c. 3.9 d. 4.3
Use the sum-of-the-years'-digits method of depreciation. Round to the nearest dollar.Find the book value at the end of the third year for a service van which cost $16,000, has a life of 8 years, and an estimated scrap value of $1,600.
A. $8,400 B. $6,000 C. $10,000 D. $7,600