Which expression is equivalent to cos 150°? three choices are:
A. cos 30°
B. cos 330°
C. cos (-30°)
D. cos (-210°)​

X2 + y 2 = 36 x + y = 6 solve the system of equations.

Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.

Which term below correctly completes the following sentence? if a function has a vertical asymptote at a certain x value, then the function is what at that value