Choose the graph that matches the function. f(x) = 2x + 5
A. 
B. 
C. 
D. 
Answer: B
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Solve by the quadratic formula. If there are no real roots, say so.
- 
= 
A. No real solution
B. y = 
C. y = 
D. y = - 
, y = 
Find the domain of the composite function (f ? g)(x). Write the domain in interval notation.f(x) = 
, g(x) = 
A. (-?, -3) ? (-3, -1) ? (-1, 0) ? (0, ?) B. (-?, -1) ? (-1, 0) ? (0, ?) C. (-?, ?) D. (-?, -3) ? (-3, 0) ? (0, ?)
Solve the problem.A rock falls from a tower that is 160 feet high. As it is falling, its height is given by the formula 
How many seconds (in tenths) will it take for the rock to hit the ground (h = 0)?
A. 12.6 sec B. 3.2 sec C. 12 sec D. 1600 sec
Solve the problem.The formula 
is used in electrical engineering. The variables I, V, and Z are complex quantities. Find V for the given values of I and Z, and express the answer in standard form.
A. -45 - 108i B. 108 - 45i C. 108 + 45i D. -45 + 108i