Simplify the radical.-
A. -6
B. -90
C. -23
D. -15
Answer: A
Mathematics
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Solve the problem.An auxiliary fuel tank for a helicopter is shaped like the surface generated by revolving the curve 
, - 2 ? x ? 2, about the x-axis (dimensions are in feet). If a cubic foot holds 7.481 gallons and the helicopter gets 3 miles to the gallon, how many additional miles will the helicopter be able to fly once the tank is installed (to the nearest mile)?
A. 75 B. 150 C. 50 D. 38
Mathematics
Solve the proportion for the given variable. 
= 
A. 3 B. 6 C. 7 D. 4
Mathematics
Solve and simplify.x + 
= 
A. x = 
B. x = 
C. x = 
D. x = 
Mathematics
Perform the indicated operation(s). Simplify if possible.
- 
A. 2y B. 0 C. 4y D. 5x
Mathematics