Solve the problem.A twin-engined aircraft can fly 960 miles from city A to city B in 4 hours with the wind and make the return trip in 6 hours against the wind. What is the speed of the wind?
A. 60 mph
B. 80 mph
C. 20 mph
D. 40 mph
Answer: D
Mathematics
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Use the rules for exponents to rewrite the expression and then evaluate the new expression. 
A. -14 B. -5 C. 0 D. 1
Mathematics
What are the values of x and y to satisfy the following equations?
x + y = 4; 3x - 2y = 7 a. x = 1 y = 3 b. x = -1 y = -3 c. x = -3 y = 1 d. x = 3 y = -1 e. x = 3 y = 1
Mathematics
Solve the problem.A cup of coffee with temperature 105°F is placed in a freezer with temperature 0°F. After 6 minutes, the temperature of the coffee is 65°F. What will its temperature be 14 minutes after it is placed in the freezer? Round your answer to the nearest degree.
A. 27°F B. 32°F C. 34°F D. 29°F
Mathematics
Evaluate the expression using the given values.
x = 9, y = 6
A. 2
B. 7
C. 23
D. 
Mathematics