Subtract.(5x2 - 11x + 8) - (2x2 - 8x + 15)
A. 3x2 - 3x + 7
B. 3x2 - 9x + 23
C. 3x2 - 3x + 23
D. 3x2 - 3x - 7
Answer: D
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Perform the indicated operation and reduce the answer to lowest terms.
- 
A. 
B. 
C. 
D. 
Write an equivalent fraction with the given denominator. 
= 
A. 21 B. 5 C. 15 D. 3
Rewrite the quadratic function in standard form by completing the square.f(x) = x2 + 20x + 109
A. f(x) = (x - 10)2 + 9 B. f(x) = (x - 10)2 - 9 C. f(x) = (x + 10)2 + 9 D. f(x) = (x + 10)2 - 9
Solve the problem.The average number of vehicles waiting in line at a toll booth of a super highway is modeled by the function 
, where x is a quantity between 0 and 1 known as the traffic intensity. What happens to the average number of vehicles waiting as traffic intensity increases?
A. The average number of vehicles waiting increases. B. The average number of vehicles waiting decreases at first, but then increases. C. The average number of vehicles waiting remains constant. D. The average number of vehicles waiting decreases.