Write the expression with only positive exponents and evaluate if possible. Assume all variables represent nonzero real numbers.- 
(8y)
A. -4y
B. 2y
C. 3y
D. -2y
Answer: D
Mathematics
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Choose the graph that matches the function. f(x) = -2x + 4
A. 
B. 
C. 
D. 
Mathematics
Evaluate the integral.
A. 
[ sin 2x + cos 2x] + C
B. 
[2 e7x sin 2x + 7 cos 2x] + C
C. 
[2 sin 2x - 7 cos 2x] + C
D. 
[2 sin 2x + 7 cos 2x] + C
Mathematics
Solve the following system by any appropriate method. If there is no real number solution, so state.y - 9x = 09x2 + y2 = 90
A. (1, 9) B. (-1, -9), (1, 9), (-1, 9), (1, -9) C. (-1, -9), (1, 9) D. (-1, -9)
Mathematics
Solve the problem.Indicate which digit in 54,972 has place value thousands.
A. 4 B. 0 C. 9 D. 7
Mathematics