The ordered pair (-1,5) is a solution to the system because it makes both equations true.
1) x+y=4
2) x-y=-6
1) -1 + 5 = 4
5-1 = 4 you can switch the order to make it easier to understand
so
4 = 4
2) -1 - 5 = -6
-1 + -5 = -6 you can change the sign in the middle and make y -
so
-6 = -6
I don’t think it’s c it is c
Just put the numbers under one square root symbol and try to simplify.
-9/5 or -1.8
2 - - 3 = 5
-5 - 4 = -9
