Find the centroid of the region.
A. 
= 
, 
= 
B. 
= 
, 
= 
C. 
= 
, 
= 
D. 
= 
, 
= 
Answer: A
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Find parametric equations for the line described below.The line through the point P(-7, 4, 4) and perpendicular to the vectors 
and 
A. x = -59t - 7, y = -47t + 4, z = -84t + 4 B. x = -59t - 7, y = 47t + 4, z = -4t + 4 C. x = -59t - 7, y = 47t + 4, z = -84t + 4 D. x = -59t + 7, y = 47t - 4, z = -4t - 4
Use analytical methods to solve the equation.
= 
A. 3 B. -1 C. 1 D. -3
Solve.Tyler and his sister arranged a party for their father's birthday. The total cost of the party was 
Tyler paid 
of the total cost and his sister paid the remainder. How much did Tyler pay?
A. $555 B. $540 C. $550 D. $560
Solve the equation exactly in the complex number system.x3 + 2x2 + 49x + 98 = 0
A. x = -2, x = ±7i
B. x = -2, x = 98i, x = 49i
C. x = -2, x = ±
D. x = -
, x = ±7i