Solve.A plane makes a 240-mile trip against a head wind in 1 hour and 30 minutes and returns, with a tail wind of the same speed, in 1 hour. What is the speed of the wind?
A. 40 mph
B. 200 mph
C. 160 mph
D. 80 mph
Answer: A
Mathematics
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Solve. Then graph the solution.x2 - 6x - 7 ? 0
A. (-?, -1]
B. [7, ?)
C. (-?, -1] ? [7, ?)
D. [-1, 7]
Mathematics
State the domain of the rational expression.
A. {x|x ? -1, x ? 1} B. {x|x ? 0, x ? -1} C. {x|x ? -1, x ? -4, x ? 1} D. All real numbers
Mathematics
Do the operation and express the answer in 
form.
?
What will be an ideal response?
Mathematics
Find the polar coordinates of the point. Express the angle in degrees and then in radians, using the smallest possible positive angle.(-5
, 5
)
A. (5
, 30°), 
B. (5
, 150°), 
C. (5
, 120°), 
D. (5
, 135°), 
Mathematics