Solve the system by the addition method. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. {(-5, 6)}
B. {(6, -6)}
C. {(-6, 6)}
D. {(10, -10)}
Answer: B
Mathematics
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Solve the problem by integration.The current i (in A) as a function of the time t (in s) in a certain electric circuit is given by 
Find the total charge that passes a given point in the circuit during the first three seconds.
A. 3.761 C B. 1.254 C C. 11.284 C D. 3.738 C
Mathematics
Determine the prime power representation of the number.20
A. 22 ? 5 B. 52 C. 4 ? 5 D. 4 ? 2
Mathematics
Use the order of operations to simplify the expression.
÷ 
A. 3
B. 1
C. 
D. 4
Mathematics
Assume that the probability that an airplane engine will fail during a torture test is 
and that the aircraft in question has 6 engines. Find the probability that all engines will survive the test.
?
A. 
B. ?
C. ?
D. ?
Mathematics