Pls help! will give brainlist!

using substitution, what is the solution for the system of equations below?

A. (2,5)
B. (2,31)
C. (2,4)
D. (5,2)

Listed in the table is the percentage of students who chose each kind of juice at lunchtime. use the table to determine the measure of the central angle you would draw to represent orange juice in a circle graph

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .