Simplify by combining like terms.9y2 + y2
A. 9y4
B. 9y2
C. 10y4
D. 10y2
Answer: D
Mathematics
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Locate the fraction on the number line. 
A. 
B. 
C. 
D. 
Mathematics
Factor the sum or difference of two cubes completely.27x3 - y3
A. (27x - y)(x2 + 3xy + y2) B. (3x - y)(9x2 + y2) C. (3x + y)(9x2 - 3xy + y2) D. (3x - y)(9x2 + 3xy + y2)
Mathematics
Write each expression in factored form as an algebraic expression of a single trigonometric function.
A. sin 2 x + 1 B. - cos x C. sin x + 1 D. sin x - 1
Mathematics
Solve the problem.A weight attached to a spring is pulled down 4 inches below the equilibrium position. Assuming that the frequency of the system is 
cycles per second, determine a trigonometric model that gives the position of the weight at time t seconds.
A. y = 4 cos 8t
B. y = 4? cos 4t
C. y = -4 cos 
t
D. y = -4 cos 8t
Mathematics