Determine whether the graphs of the equations are parallel lines, perpendicular lines, or neither. 3x - 4y = -3 8x + 6y = -3
A. Parallel
B. Neither
C. Perpendicular
Answer: C
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Find the standard-form equation of the ellipse centered at the origin and satisfying the given conditions.An ellipse having a focus at (
, 0) and directrix x = 
.
A. 
+ y2 = 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Simplify the expression.
A. -sin x B. cos2x C. sin 2x D. -cos x
Solve the problem.A professional basketball player has a vertical leap of 37 inches. A formula relating an athlete's vertical leap V, in inches, to hang time T, in seconds, is V= 48T2. What is his hang time? Round to the nearest tenth.
A. 0.8 sec B. 0.6 sec C. 1 sec D. 0.9 sec
Solve the problem. Round to the nearest tenth, if necessary.If an object is propelled upward from a height of 80 feet at an initial velocity of 64 feet per second, then its height after t seconds is given by the equation 
, where h is in feet. After how many seconds will the object reach a height of 144 feet?
A. 1 sec B. 4 sec C. 8 sec D. 2 sec