Begin by drawing a rough sketch to determine the number of real solutions for the equation y1 = y2. Then use an analytic method to confirm your answer. Give the solution set and any extraneous values that may occur.y1 = 
y2 = -x + 8
A. 
One real solution; {9}; no extraneous values
B. 
No real solutions; ?; no extraneous values
C. 
One real solution; 
; 
is extraneous.
D. 
Two real solutions; 
; no extraneous values
Answer: C
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Use the graph to answer the question.
Mike decides to buy shares of companies X and Y, which were initially selling for the same price. The changes in each stock's value over 90 days are shown in the graph above. At day 90, Mike decides to buy more of one of the stocks. Which stock should he choose?
A. X B. Y
Find all possible solutions to the problem.When Joan made a purchase, she received 16 cents in change. What are the possible combinations of coins she could have received?
What will be an ideal response?
A point lying on the terminal side of angle ? is given. Find the exact value of the indicated trigonometric function of ?.(15, 20) Find cos ?.
A. 
B. 
C. 
D. 
Multiply.(-5x - 2)2
A. -5x2 + 20x + 4 B. -5x2 + 4 C. 25x2 + 20x + 4 D. 25x2 + 4