Determine if the graph of the function opens upward or downward and whether it has a maximum or a minimum point.f(x) = 2 - 4x + 9x2
A. Downward, minimum
B. Upward, minimum
C. Upward, maximum
D. Downward, maximum
Answer: B
Mathematics
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Simplify.(-49 ÷ 7) - (9 ÷ 9)
A. 6 B. -8 C. -7 D. 7
Mathematics
Use the fundamental identities to simplify the expression.cos (-x) cos x - sin (-x) sin x
A. 0 B. cos2x sin2x C. 2 D. 1
Mathematics
Determine which of the following point lies on the graph of the equation.
?
?
A. (3, 1) B. (2, 3) C. (4, 1) D. (2, 1) E. (2, 2)
Mathematics
Using the restrictions stated for the function, find a rule for f-1.f(x) = x2 - 20, x ? 0
A. f-1(x) = - 
B. f-1(x) = x2 + 20
C. f-1(x) = 
D. f-1(x) = - 
Mathematics