Evaluate.
, when p = -21 and q = -3
A. 21
B. -21
C. -49
D. 49
Answer: D
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Find the center of mass (in cm) of the particles with the given masses located at the given points on the x-axis.11 g at (-2.5, 0), 17 g at (2.8, 0), 31 g at (6.5, 0)
A. 1.1 cm B. 3.8 cm C. 8.7 cm D. 33 cm
Find the center, foci, and vertices of the ellipse.
+ 
= 1
A. center at (0, 0)
foci at (- 
, 0) and (
, 0)
vertices at (-8, 0), (8, 0)
B. center at (0, 0)
foci at (0, -3) and (0, 3)
vertices at (0, -9), (0, 9)
C. center at (0, 0)
foci at (0, - 
) and (0, 
)
vertices at (0, -8), (0, 8)
D. center at (0, 0)
foci at (-8, 0) and (8, 0)
vertices at (-64, 0), (64, 0)
Evaluate.-(-|-6|)
A. -1 B. 1 C. 6 D. -6
Solve the triangle. Round lengths to the nearest tenth and angle measures to the nearest degree.a = 8, b = 6, c = 4
A. A = 104°, B = 47°, C = 29° B. A = 47°, B = 29°, C = 104° C. A = 104°, B = 29°, C = 47° D. A = 47°, B = 104°, C = 29°