Answer:
The second one
The third one.
The last one.
Step-by-step explanation:
Hope this helps!
I believe it is this one here. If you have any questionable let me know
Answer:

Step-by-step explanation:

$4.50 depending on hum much you use
Answer:
y + 1 = 3x
Step-by-step explanation:
In order for there to be an infinite number of solutions, the two lines need to be the same.
y+1 = 3x
y=3x-1 are both the same