Factor completely. If unfactorable, indicate that the polynomial is prime.x4 - 16x2 - 225
A. (x + 5)(x - 5)(x2 + 9)
B. (x + 5)(x - 5)(x + 3)(x - 3)
C. (x - 5)2(x2 + 9)
D. (x2 - 25)(x2 + 9)
Answer: A
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Solve the problem.A skier is heading downhill at a speed of 13 mph. The slope of the hill makes an angle of 37.2° with the horizon. To the nearest tenth, what are the components of her velocity?
A. -36.2 mph, -8.4 mph B. 36.2 mph, 8.4 mph C. -10.4 mph, -7.9 mph D. 10.4 mph, 7.9 mph
Solve the system of equations by the elimination method. Check your solutions. For any dependent equations, write your answer in ordered pair form.
A. {(3, 9)} B. {(4, 9)} C. ? D. {(4, 8)}
Evaluate the function.Find f(-3) when f(x) = 
.
A. 2
B. - 
C. 
D. 
Find an equation of the line containing the given points. Express your answer in slope-intercept form.
A. y = 3 B. x = 3 C. y = x - 3 D. y = x + 3