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 - 
x + 7
A. minimum at 
B. minimum at 
C. maximum at 
D. maximum at 
Answer: C
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Solve the problem.A projectile is fired with an initial velocity of 400 feet per second at an angle of 70° with the horizontal. To the nearest foot, find the maximum altitude of the projectile.
A. 2191 ft B. 2200 ft C. 2208 ft D. 2224 ft
Factor out the greatest common factor. Be sure that the coefficient of the term of highest degree is positive.50x + 10
A. 2(25x + 5) B. 10(5x + 1) C. 10(5x) D. 5(10x + 2)
For the given functions f(x) and g(x), find a value x for which (f?g)(x) = (g?f)(x).f(x) = x2 + 6x + 9, g(x) = x + 4
A. x = 
B. x = 
C. x = - 
D. x = - 
Find the mean.Following is a list of rainfall amounts for the past five months. Each amount is the total of rainfall in a month. Calculate the mean. Round to the nearest tenth when necessary. 4.2 in.
5 in.
2 in.
5 in.
1.8 in.
A. 3 in. B. 3.6 in. C. 4.2 in. D. 5 in.