In the above figure, m∠P = 120° and m∠Q = (5x)°. If angles P and Q are supplementary angles, what are the value of x and the measure of angle Q? A.
x = 12, m∠Q = 60°
B.
x = 60, m∠Q = 60°
C.
x = 12, m∠Q = 17°
D.
x = 42, m∠Q = 210°

Could somebody me with this radical simplification?

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]

Can someone tell me if this is perpendicular? !