Divide.
A. 127
B. 13.7
C. 137
D. 12.7
Answer: D
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Simplify the given expression. Expansion of any term is not necessary; proper recognition of the form of the expression leads to the proper result.4 sin 2x cos 2x
A. 
sin 16x
B. cos 4x
C. cos 8x
D. 2 sin 4x
The graph of a certain function y = f(x) and the zero of that function is given. Using this graph, find a) the x-intercept of the graph of y = f(x) and b) the solution to the equation f(x) = 0.
A. a. -1 b. x = -1 B. a. -2 b. x = 0 C. a. -2 b. x = -2 D. a. 0 b. x = -2
Perform the indicated operation. If possible, simplify.Simplify:cos x - 
A. 
B. - tan x csc x
C. - tan x sec x
D. - tan x sin x
Solve.The height of a golf ball in feet after t seconds is given by 128t - 16t2. Factor this expression.
A. 16t2(8 - t) B. 16t(8 - t) C. 16(8t - t2) D. 4t(32 - 4t)