Factor the trinomial completely. If the trinomial cannot be factored, say it is prime.3x2 + 6x - 45
A. 3(x - 3)(x + 5)
B. (3x + 9)(x - 5)
C. 3(x + 3)(x - 5)
D. (x - 3)(3x + 15)
Answer: A
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Find the center of mass of a thin plate of constant density covering the given region.The region enclosed by the parabolas y = - x2 + 18 and y = x2
A. 
= 0, 
= 
B. 
= 0, 
= 9
C. 
= 9, 
= 0
D. 
= 0, 
= 18
Solve the problem.Assume t is time measured in seconds and velocities have units of m/s. Find the displacement over the given interval for the velocity function v(t) = 10 sin t on 0 ? t ? 
.
A. 10 m B. 1 m C. -10 m D. 0 m
Each line contains the given points. Find the slope of each line to determine if the lines are parallel, perpendicular, or neither.L1: (-4, 7) and (10, 15)L2: (9, -3) and (13, 4)
A. neither B. parallel C. perpendicular
Convert.0.079 dekaliters to cubic centimeters
A. 790 cc B. 7.9 cc C. 79 cc D. 0.79 cc