Perform the following operation.
?
Multiply (5x + 6) and (x - 8).
?
A. 
B. 
C. 
D. 
E. 
Answer: E
Mathematics
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Solve the problem.The revenue received from the sale of electric heaters is seasonal, with maximum revenue in the winter. Let the revenue received from the sale of heaters be approximated by R(x) = 380 cos 2?x + 600, where x is time in years, measured from January 1. Find R'(x) for March 1st.
A. -380?
B. 0
C. -380?
D. -380?
Mathematics
Use the rules for exponents to rewrite the expression and then evaluate the new expression. (-2)2(-2)3
A. -64
B. -32
C. 
D. 
Mathematics
Plot the point on the rectangular coordinate system provided. Write the corresponding letter as your answer.
(3, 5)
A. K B. D C. I D. L
Mathematics
Simplify the expression.
? 
A. 
B. 
C. 
D. 
Mathematics