How many solutions does the system have?
y = -3x+9.
3y=-9x+9

No solutions

Explanation:

1. Divide the second equation by 3

3y=-9x+9

y=-3x+3

2. Plug the first equation into the second as y

-3 cancels out on both sides (since it's on both sides of the equation)

Because the left side of the equation doesn't equal the right side, we can conclude that the system of equations has no solution.

I hope this helps! Please comment if you have any questions :)

a conclusion based on evidence is an example of a. inference

i feel like it is actually b.