Factor.r2 + 2r + 1
A. (r + 1)(r - 1)
B. (r + 2)(r - 2)
C. (r + 1)2
D. (r - 1)2
Answer: C
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Solve the system by the addition method.6y = 63 - 7x2x = 78 - 6y
A. {(7, -14)} B. {(6, -14)} C. {(-3, 14)} D. ?
If r(t) is the position vector of a particle in the plane at time t, find the indicated vector.Find the acceleration vector.r(t) = (3 ln(2t))i + (6t3)j
A. a = 
i + 18tj
B. a = 
t-2i + 36tj
C. a = - 
t-2i + 36tj
D. a = - 
i + 36tj
Solve.Two machines are turned on at 8:00 A.M. If one can produce 25 items each hour and the other can produce 37 items each hour, at what time will they produce a total of 434 items?
A. 4:30 P.M. B. 2:00 P.M. C. 3:00 P.M. D. 4:00 P.M.
Graph the given function as a solid line (or curve) and its inverse as a dashed line (or curve) on the same set of axes.f(x) = -7x + 4
A. 
B. 
C. 
D. 