Solve the problem.A plane flies 440 miles with the wind and 330 miles against the wind in the same length of time. If the speed of the wind is 29 mph, what is the speed of the plane in still air?
A. 193 mph
B. 228 mph
C. 208 mph
D. 203 mph
Answer: D
Mathematics
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Find the root. If the root is not a real number, so state.
A. 6.233 B. not a real number C. 16 D. 4
Mathematics
Write the whole number in standard form.20,000,000 + 10,000 + 6000 + 900 + 70
A. 2,016,970 B. 20,016,970 C. 2,001,697 D. 20,106,970
Mathematics
Find the product.(2x + 9y)2
A. 4x2 + 36xy + 81y2 B. 2x2 + 36xy + 81y2 C. 2x2 + 81y2 D. 4x2 + 81y2
Mathematics
Find the fifth term and the nth term of the geometric sequence whose initial term, a, and common ratio, r, are given.a = -5; r = -5
A. a5 = -3125; an = -5 ? (-5)n-1 B. a5 = -3125; an = -5 ? (-5)n C. a5 = 625; an = -5 ? (-5)n D. a5 = 625; an = -5 ? (-5)n-1
Mathematics