Please help with number 8. And if you can explain how you got the answer please do and I’ll give brainliest

X=7.9

Y=7.9

Step-by-step explanation:

We have that x=y

And form Pythagoras theorem we have

So x = y = 7.9

Without graphing, we can tell that a solution is going to be (0,-1). This is because in slope intercept form, y=mx+b, the “b” is our “y intercept.”
What this means is: the point on the graph that the given line goes through when x=0. In this case, “b” is -1, so the line will go through (0,-1).