Answer:
1: 3/1 also just 3
2: 0 also known as the origin
3: y=3x
Step-by-step explanation:
The greatest common factor of 64 and 72 is 8.
-4(7 + 3a) - 6a(4a - 5) = <em><u>−24</u></em><em><u>+18a−28</u></em>