Answer:
- 1
Step-by-step explanation:

= 
= - 1
Answer:
4
Step-by-step explanation:
The side length would be 4, but I'm a bit confused on what the "Recall the Formula" portion is about. I'm sorry if this doesn't help
Answer:
3x-4y=4
Step-by-step explanation:
About 3 gallons of blue paint will be needed because if you add 175+175 it equals 350 and then add another 175 it equals 525.