Solve the system by addition.0.15x + 0.03y = 0.125x + y = 4
A. 
B. 
C. 
D. ?
Answer: A
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Solve the problem.Suppose you buy a $9000 savings bond that pays 4.75% annual simple interest. When you cash in the bond, you have to pay 16% federal taxes on the interest you earned. How much money would you net if you cash in the bond after six years? Round your answer to the nearest cent.
A. $13,275.30 B. $10,915.20 C. $10,440.70 D. $11,565.60 E. $11,154.60
Solve.x4 - 9x2 + 20 = 0
A. ±2, ±2
B. 2, 
C. ±2, ±
D. ±2, ±5
Solve the problem.Two cars start from the same point and travel in the same direction. If one car is traveling 64 miles per hour and the other car is traveling at 56 miles per hour, how far apart will they be after 7 hours?
A. 448 mi B. 840 mi C. 56 mi D. 392 mi
Indicate whether the function is one-to-one.C = {(8, 8), (-8, -8), (1, 2), (-1, -2)}
A. No B. Yes