A plane can fly 480 mph in still air. If it can fly 540 miles downwind in the same amount of time it can fly 420 miles upwind, find the velocity of the wind.
?
Please enter your answer as a number without the units.
Fill in the blank(s) with the appropriate word(s).
60
Mathematics
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Solve the problem.What is the ratio of the surface areas for a pair of spheres when the ratio of the radii is 3:2?
A. 3 : 2 B. 9 : 4 C. 27 : 8 D. Not enough information given
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Simplify the expression.2(3y + 9y)
A. 12y2 B. 12y C. 27y D. 24y
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Simplify the root.- 
A. - 
B. 
C. x3
D. - x3
Mathematics
Solve. Graph the solution on a number line, and express it in interval notation.0.6x + 16 + x > 2x + 22 - 0.5x
A. x ? -6, [-6, ?)
B. x > 60, (60, ?)
C. x < -6, (-?, -6)
D. x < 60, (-?, 60)
Mathematics