Answer:
formal proof
Step-by-step explanation:
https://quizlet.com/230868297/geometry-u2-review-flash-cards/
5/12 - 4/5 = -23/60. You can't simplify -23/60. Hope this is right
Answer: 2a - 7
<u>Step-by-step explanation:</u>
Ana: a
Mrs Vargas: 4a - 4
Leo: 2a + 3
Mrs Vargas - Leo
= (4a - 4) - (2a + 3)
= 4a - 4 -2a - 3
= 2a - 7