The graph shows the monthly revenue in millions of dollars of a growing company after the company doubled its advertising. Use the graph to solve the problem. 
How many months after the company doubled its advertising did the maximum monthly revenue occur.
A. 12 months
B. 6 months
C. 0 months
D. 9 months
Answer: B
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Graph the equation.3y = 21
A. 
B. 
C. 
D. 
Multiply the polynomials and simplify by combining like terms.(2x2 + 5x + 5)(x2 - 5x - 4)
A. 2x4 - 5x3 - 28x2 - 45x - 20 B. 2x4 - 10x3 - 28x2 - 45x - 20 C. 2x4 - 10x3 - 33x2 - 45x - 20 D. 2x4 - 5x3 - 33x2 - 45x - 20
Find the constant of proportionality for the stated conditions: z is directly proportional to the sum of x and y, and when src="https://sciemce.com/media/3/ppg__cognero__2.6_Proportion_and_Variation__media__b91aede3-c939-46fc-863e-e988ae621be5.PNG" class="wirisformula" align="middle" style="vertical-align: middle;" data-wiris-created="true" varid="variable_id_field" variablename="impvar_75af0df0b3c845f4a9de3e64d" />.
Fill in the blank(s) with the appropriate word(s).
, 
and
Factor completely, or state that the polynomial is prime.2x4 - 2
A. 2(x2 + 1)(x2 - 1) B. 2(x2 + 1)(x + 1)(x - 1) C. 2(x + 1)2(x - 1)2 D. prime