Simplify the expression. Write the answer using positive exponents.(a + 6)-2
A. -2(a + 6)
B. 
C. -(a + 6)2
D. 
Answer: B
Mathematics
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Graph the function.The voltage e for an alternating-current circuit is given by 
. Sketch two cycles of the voltage as a function of time. Label the point on the horizontal axis which represents the end of the second cycle.
A. 
B. 
C. 
D. 
Mathematics
Find the difference.36 - 2.24
A. 33.26 B. 33.76 C. 33.86 D. 38.24
Mathematics
Solve the system. If the system's equations are dependent or if there is no solution, state this. x + 3y + 2z = 11 4y + 9z = -12x + 7y + 11z = -11
A. The equations are dependent. B. (0, 3, 1) C. (1, 6, -4) D. No solution
Mathematics
Multiply.3.9(-3.22)
A. 7.12 B. -12.558 C. 7.22 D. 0.68
Mathematics