Answer:
Axiom
Step-by-step explanation:
This is called a axiom. Not too sure if you mean the the definition but this is the definition. Hope this helped c:

Step-by-step explanation:
1. B is true
2 . I don't know
3.
Answer:
He multiplied 25 by 1 and then multiplied 25 by 9 correctly. He added the two partial products correctly
Step-by-step explanation:
1) 3
2) 8
3)10
4)-4
Hope this helped
Answer:
To check if a given value is a solution to an equation:
Evaluate the left-hand side expression at the given value to get a number.
Evaluate the right-hand side expression at the given value to get a number.
See if the numbers match.