Given the functions f(x) and g(x), find the appropriate sum or difference function.f(x) = 5x2 - 9 and g(x) = 5x2 + 6x + 5Find f(x) - g(x).
A. f(x) - g(x) = -6x - 4
B. f(x) - g(x) = 6x - 4
C. f(x) - g(x) = -6x - 14
D. f(x) - g(x) = 10x2 + 6x - 4
Answer: C
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Consider a function 
. If 
is constant and positive, what can be said about the function f?
?
A. f is linear with positive slope. B. f is linear with negative slope. C. f is constant and positive. D. f is constant and negative.
Solve.An airplane travels 500 miles against the wind in 5 hours, and makes the return trip with the same wind in 2 hour(s). Find the rate of the wind.
A. 250 mph B. 100 mph C. 175 mph D. 75 mph
Solve the problem.Three trains - one eastbound, one westbound, and one northbound - leave a city at the same time. The speed of the northbound train is 10 miles per hour greater than the speed of the eastbound train. After 8 hours, the distance between the westbound train and the eastbound train is 560 miles. Twice the speed of the westbound train is 40 miles per hour more than the speed of the northbound train. Find the speeds of the three trains.
A. eastbound, 30 mph; westbound, 40 mph; northbound, 40 mph B. eastbound, 20 mph; westbound, 50 mph; northbound, 40 mph C. eastbound, 40 mph; westbound, 40 mph; northbound, 30 mph D. eastbound, 40 mph; westbound, 40 mph; northbound, 50 mph
Decide if the given number is a solution to the given equation.9x2 + 3 = 75; 4
A. Yes B. No