I might be wrong, but I think it is 8.
I think it’s 8 because all side lengths are equal in a square, meaning if one side length is 8 all the other side lengths are going to be 8 also.
because you would be able to find the vertex really easily and the slope.
Answer: y = 4x- 9
Step-by-step explanation:
Answer:
Her mistakes are;
She added unlike terms
and
and gave the answer
She added -10 and 8 and gave the answer -3
Step-by-step explanation:
let us try to find her mistake
<em>We have two algebric expressions to add them</em>
→ 
→ 
We must add the like terms
<em>The like terms are:</em>
→ 4x and 2x, -10 and 8
→ 
→ 
So Let us add the expression to find her mistakes

The correct answer is: 
By comparing our answer with her answer her mistakes are:
- She added unlike terms
and
and gave the answer 
- She added -10 and 8 and gave answer -3