Divide. Simplify if possible.(x + 10) ÷ 
A. -(x - 10)(x + 10)
B. - 
C. - 
D. -1
Answer: C
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Find the indicated quantity.a25, when a1 = -7 and d = 
A. - 1
B. - 
C. - 13
D. - 
Solve the problem.Find the tangent to y = cos x at x = 
.
A. y = - x + 
B. y = 1
C. y = x + 
D. y = - x - 
Solve the problem.Suppose that during a certain step in a chemical manufacturing process the amount of hydrogen chloride dissolved in a solution, measured in parts per million (ppm), is related to the elapsed time measured from the beginning of the step. Use the following table as a representation of this relationship.
Plot the information on the following coordinate plane. What general trend do the data reflect?
A. With increasing elapsed time, the
amount of dissolved hydrogen chloride increases.
B. With increasing elapsed time, the
amount of dissolved hydrogen chloride decreases.
C. With increasing elapsed time, the
amount of dissolved hydrogen chloride increases.
D. With increasing elapsed time, the
amount of dissolved hydrogen chloride decreases.
Simplify without using a calculator.
A. 21/2
B. 2
C. 
D. 4