Graph the parabola.y = -x2 + 2x - 5
A. 
B. 
C. 
D. 
Answer: C
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Solve the problem.A generator produces an alternating current according to the equation 
, where t is time in seconds and I is the current in amperes. What is the smallest time t such that I = 12?
A. 
sec
B. 
sec
C. 
sec
D. 
sec
Find the perimeter or circumference.
A. 20 cm B. 10 cm C. 16 cm D. 4 cm
Solve the problem.A formula for calculating the distance, d, one can see from an airplane to the horizon on a clear day is 
where x is the altitude of the plane in feet and d is given in miles. How far can one see in a plane flying at 20,000 feet? Round your answer to the nearest tenth mile, if necessary.
A. 12,200 mi B. 172.5 mi C. 1220 mi D. 156.2 mi
Solve the system of linear equations. 6x - 5y = 0 3x + 2y = -27
A. (-5, -6) B. (-6, -5) C. Inconsistent: no solutions D. (-5, -5)