Solve the equations using the substitution method: 4x -2y =22 2x + 4y = 6

We have that
4x -2y =22> clear variable y
2y=4x-22> y=4x/2-22/2> y=2x-11> equation 1
2x + 4y = 6> equation 2

substitute equation 1 in equation 2
2x+4*[2x-11]=6> 2x+8x-44=6> 10x=50> x=5
then 
y=2x-11> y=2*5-11> y=-1

-The Honor Roll students would have a disadvantage to Non-Honor Roll students.

Step-by-step explanation:

-The first thing that needs to be done is to compare the probabilities of getting a class that is requested whether a student is in the Honor Roll or not.  

P(received class requested; Honor Roll) is 64/144 = 0.444 or about 44%  

P(received class requested; Not Honor Roll) is 315/356 = 0.884 or about 88%  

-This shows us that students who aren't in Honor Roll have a higher chance of receiving the class requested than those who are.

(Btw I took the test)