Solve the problem.An airplane flies 420 miles with the wind and 350 against the wind in the same length of time. If the speed of the wind is 30, what is the speed of the airplane in still air?
A. 335 mph
B. 320 mph
C. 150 mph
D. 330 mph
Answer: D
Mathematics
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Next year's value of a certain quantity is obtained by multiplying this year's value of the quantity by 0.74. Which of the following can you conclude? ?
A. The quantity grows exponentially. B. The quantity decays exponentially. C. The quantity grows linearly. D. The quantity decays linearly.
Mathematics
Determine which labeled sections make up the indicated set.
A - B
A. t, s B. t, s, v C. n, v D. t
Mathematics
Give the measure of the requested angle.The supplement of angle x is two times the angle. Find the measure of the angle and its supplement.
A. 60° and 120° B. 30° and 60° C. 45° and 135° D. 45° and 90°
Mathematics
Graph the inequality.2x + y ? 1
A. 
B. 
C. 
D. 
Mathematics