Answer:
Only b is correctly simplified.
Step-by-step explanation:
1/9 because i you plug in two of the points into y2 -y1 over x2 -x1 thats what you get.
The square root is 3.741657387
So the square root should be 3.7
2×+y=0,
×-y=6
Add the 1st to the 2nd equation==> 3x +y-y=6+0==> 3x=6 & x=2
Plug 2 into any of the equation & you will get y=-4
1) 0.4
2)0.875
i dont know the 3 and 4 one