Simplify. Be sure to rationalize all denominators. Assume that all variables represent positive real numbers.
A. 6
B. 3
C. 3
D. 
Answer: C
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Determine the most appropriate metric unit to go in the blank. Choose from km, m, cm, mm, L, mL, kg, g, and mg.Each day I drive 11 
to work.
A. kg
B. cm
C. m
D. km
E.
| L |
Solve the problem.The table lists the average composite scores on a national entrance exam for selected years. 
Make a line graph of the data. If the graph represents a piecewise-linear function f, find a symbolic representation for the piece of f located on the interval 
A. f(x) = 0.75x - 1359.5 if 1986 ? x ? 1990
B. f(x) = 4.4x - 8615.7 if 1990 ? x ? 1992
C. f(x) = 131.5 if 1986 ? x ? 1988
D. f(x) = 122.7 if 1990 ? x ? 1992
Prove the identity.tan5 x = tan x (sec4 x - 2 sec2 x + 1)
What will be an ideal response?
Solve the equation by factoring.x2 - 100 = 0
A. {10, -10} B. {-10} C. {10} D. {100}