Factor the trinomial, if possible.7x2 - 15xy - 18y2
A. y(7x + 6)(x - 3)
B. (7x + 3y)(x - 6y)
C. (7x + 6y)(x - 3y)
D. prime
Answer: C
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Find the indicated trig function of ?, if ? is an angle in standard position with the terminal side defined by the given point.(21, 28); Find cos ?.
A. 
B. 
C. 
D. 
Graph the ellipse and locate the foci.4x2 + 16y2 = 64
A. foci at (2
, 0) and (-2
, 0)
B. foci at (2
, 0) and (-2
, 0)
C. foci at (0, 2
) and (0, -2
)
D. foci at (
, 0) and (-
, 0)
Solve the system. If the system's equations are dependent or if there is no solution, state this.3x + y = 53x - z = 1 y + z = 4
A. The equations are dependent. B. No solution C. (1, 4, 0) D. (0, 5, -1)
Solve.A pendulum bob swings 6.0 cm on its first oscillation. On each subsequent oscillation the bob travels 
of the previous distance. Find the total distance the bob travels before coming to rest.
A. an = 6.0 (2)n-1
B. an = 6.0 (2)n+1
C. an = 6.0 (
)n-1
D. an = 12.0 (
)n-1