The first step to getting this in vertex form would be to put this in proper standard form. This is so that you can split the middle term which is a step of completing the square.
Answer:
The answer is D
Step-by-step explanation:
Answer:
It increased by 16%
Step-by-step explanation:


% increase
If < 6 = 57, then < 4 = 57.....(corresponding angles are equal)
and < 4 + < 1 = 180.....because they form a linear pair
57 + < 1 = 180
< 1 = 180 - 57
< 1 = 123 <===
1. She is incorrect because in step 3, she did not make sure both sides of the equation have the same base.
2. Correct
3. Correct