They didn’t use a ruler I think they made their own materials from what they had. Also thank you.
Answer:

Step-by-step explanation:

Divide both sides by 7:

Subtract 4 from both sides:

Answer: I am pretty sure it is 7
Step-by-step explanation:
the smaller one is to smaller than the bigger one so you would just add two to the 5
I believe the answer would be 30.76
Answer:
2--2-2-2-2-2-2-2-2--2-2-2-2--2
Step-by-step explanation: