Find all fixed points for the function by setting the function equal to x and solving the resulting equation for x.f(x) = x2 + 5x - 21
A. -7, -3
B. 3, 7
C. -3, 7
D. -7, 3
Answer: D
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Determine the largest open intervals of the domain over which the function is increasing, decreasing, and constant.
A. Increasing (-?, 0); Decreasing (0, ?) B. Increasing (0, ?); Decreasing (-?, 0) C. Increasing (-?, 0); Decreasing (0, -?) D. Increasing (-?, 0); Decreasing (-?, 0)
Solve. Write a mixed numeral for the answer.Brian was training to run a marathon. During the three-day period before the race he decided that he would train for a total of 12 hours. If he trained for 3
hours on the first day and 1
hours on the second day, how many hours would he need to train on the third day?
A. 6
hr
B. 6
hr
C. 7
hr
D. 6
hr
Use the discriminant to determine the number and nature of the solutions to the quadratic equation. Do not solve the equation.x2 - 8x + 16 = 0
A. two real solutions B. two nonreal solutions C. exactly one real solution
Use transformations of the graph of y = x4 or y = x5 to graph the function.f(x) = (x + 3)4 
A. 
B. 
C. 
D. 