Does anyone have the answer key to these proofs? They are Mrs. E Teaches Math introductory proofs. There are 14 total. I've done 1-9.

Statement 1:  2AB = AC

Reason 1: Given

Statement 2:  AC = AB+BC

Reason 2: Segment addition postulate (which your teacher abbreviated to "Seg + Post")

Statement 3: 2AB = AB+BC

Reason 3: Substitution

Statement 4:  2AB-AB = AB+BC-AB

Reason 4: Subtraction Property of Equality

Statement 5: AB = BC

Reason 5: Combine like terms

Notes:

The first reason is "given" since we just simply restate what the instructions provide. If you are given multiple items, you list each one at a time. The segment addition postulate is where we break a line into smaller parts and then build it back together.Substitution is simply replacement. We've replaced AC with 2AB.The subtraction property of equality is the idea where we subtract the same thing from both sides. In statement 4, we're subtracting AB from both sides.The last statement of any proof is always the thing we're trying to prove. Once we reach such a statement, there's no need to go any further since the proof has concluded.

Y’all got to do it all over