Use a graphing calculator to determine which of the following expressions asserts an identity.2 
= ...
A. 2 cosx + 2 sin x
B. 2 cos 2x
C. 2
D. 2 cos x - 2 sin x
Answer: D
Mathematics
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Evaluate the expression for the values given.3x2 - 6x - 1 for x = -3
A. -10 B. 8 C. -46 D. 44
Mathematics
Solve the problem. Express any improper fraction as a whole or mixed number.Martha can rake the leaves in her yard in 6 hours. Her brother can do the job in 7 hours. How long will it take them to do the job working together?
A. 
hr
B. 3
hr
C. 42 hr
D. 
hr
Mathematics
Write an equation for the piecewise function.
A. f(x) = 
B. f(x) = 
C. f(x) = 
D. f(x) = 
Mathematics
You are given the graph of the derivative 
of a function f.
(a) Determine the intervals on which f is increasing or decreasing.
(b) Find the x-coordinate of the relative maxima and relative minima of f.
Mathematics