Use the quadratic function to determine if the function has a maximum or minimum value and then find this maximum or minimum value.f(x) = x2 + 20x + 91
A. maximum at (-9, 0)
B. maximum at (-9, -10)
C. minimum at (-10, -9)
D. minimum at (0, -10)
Answer: C
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Simplify the expression. Assume that all variables are positive when they appear.
A. 10y6 B. 100y6 C. 10y12 D. 10y10
Place the correct symbol, < or >, in the blank between the decimals. -31.06 
-31.3
A. > B. <
Solve the system of nonlinear equations using the method of elimination.
A. (
, 8), (
, -8), (-
, 8), (-
, -8)
B. (
, 8), (-
, 8)
C. (8, 
), (8, -
)
D. ?
Provide an appropriate response.Ben drove his car 705 kilometers in 5 hours while he was on vacation in Italy. He was trying to estimate how far he could drive in 8 hours the next day so he set up the following proportion: 
Explain why this proportion will not give him the correct answer.
What will be an ideal response?