Use the given information to find the exact value of the trigonometric function.cos ? = - 
, ? lies in quadrant III
Find cos 
.
A. 
B. - 
C. 
D. - 
Answer: B
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Solve.The world record for a marathon, set in 2003, is 2 hours 4 minutes 55 seconds. A marathon is 26.2 miles. What was the runner's average speed in ft/sec? Round to 1 decimal.
Fill in the blank(s) with the appropriate word(s).
Evaluate.(-7)4
A. 28 B. -28 C. -2401 D. 2401
Solve the system of equations by using the inverse of the coefficient matrix.x - y + z = -12x + y + z = -2x + y - z = 4
A. (-4, -3, 5) B. (-3, -4, 5) C. (-4, 5, -3) D. No inverse, no solution for system
Given 
. Determine the domains of f(x) and g(x).
?
A. Domain of f(x): all real numbers except 11 and 
Domain of g(x): all real numbers except 0
B. Domain of f(x): all real numbers except
Domain of g(x): all real numbers except 1
C. Domain of f(x): all real numbers
Domain of g(x): all real numbers
D. Domain of f(x): all real numbers except
Domain of g(x): all real numbers except 0
E. Domain of f(x): all real numbers except 0 and
Domain of g(x): all real numbers except 0