Simplify the algebraic expression.10x + 7(y - 3) + 9
A. 3xy - 12
B. 10x + 7y - 12
C. 17xy - 30
D. 10x + 7y + 30
Answer: B
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Solve the problem.Suppose that during a certain step in a chemical manufacturing process the amount of chlorine 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. Make a scatter diagram of the data. What is happening to the amount of chlorine in solution during this time frame?
A. The amount of chlorine dissolved
increased as time elapsed.
B. The amount of chlorine dissolved
increased as time elapsed.
C. The amount of chlorine dissolved
increased as time elapsed.
D. The amount of chlorine dissolved
decreased as time elapsed.
Draw a sketch of the two graphs described, with the indicated number of points of intersection.A circle and an ellipse; two points
A. 
B. 
C. 
D. 
Prove: ?A ? ?B
Given: ?A is the complement of ?C
?B is the complement of ?C
 PROOF.png)
Multiply.(9a - 1)2
A. 9a2 - 18a + 1 B. 81a2 - 18a + 1 C. 81a2 + 1 D. 9a2 + 1