Answer:
3.7
Step-by-step explanation:


Hope this helps
This is how the first one would be done. sorry if it’s a little messy the answer is 9. but try using photomath for the rest. it gives you the answer and explains how to do it
Answer:
1st:

2nd:

3rd:

Step-by-step explanation:
Graph all of them and see which ones cross the x- axis at the same points.