Solve using the quadratic formula.9x2 + 21x + 10 = 0
A. - 
, - 
B. - 
, - 
C. 
, 
D. 
, - 
Answer: B
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 
- 5 ? x ? 5, 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. 376 B. 125 C. 94 D. 188
Mathematics
Evaluate.Find (f ? g)(4) given f(x) = x2 - 4x - 45 and g(x) = 25 - x2.
A. -450 B. -405 C. -404 D. -36
Mathematics
Solve the problem.Find the correct sum for the base four addition fact.2four + 3four = 3four + 2four = ?
A. 5four B. 10four C. 12four D. 11four
Mathematics
Simplify the radical.
A. ?16 B. 4 C. 16 D. ?4
Mathematics