Solve the system by substitution. If the system is inconsistent or dependent, say so.
A. (-4, -1)
B. (4, 0)
C. (5, 4)
D. empty set solution; inconsistent system
Answer: B
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Determine whether the test point is a solution to the linear inequality.(6, 16), y > 2x + 4
A. Yes B. No
Find the center of mass of a thin plate of constant density covering the given region.The region bounded by the parabola x = y2 and the line x = 9
A. 
= 9, 
= 0
B. 
= 0, 
= 
C. 
= 36, 
= 0
D. 
= 
, 
= 0
Solve the problem.After t seconds the height s of an object propelled upward with an initial velocity of 3200 feet per second is given by s = 3200t - 16t2. What is the height the ball reaches after 114 seconds?
A. 156,864 feet B. 366,624 feet C. 362,976 feet D. 572,736 feet
Find the center, foci, and vertices of the ellipse.25x2 + 49y2 = 1225
A. center at (0, 0)
foci at (-7, 0) and (7, 0)
vertices at (-49, 0), (49, 0)
B. center at (0, 0)
foci at (0, - 2
) and (0, 2
)
vertices at (0, -7), (0, 7)
C. center at (0, 0)
foci at (- 2
, 0) and (2
, 0)
vertices at (-7, 0), (7, 0)
D. center at (0, 0)
foci at (0, -5) and (0, 5)
vertices at (0, -25), (0, 25)