Does anyone have the answers to Linear Functions test, just up to 23 and 24, im only confused on the rest of them! Thank you and have a good day

Which simplifys to a+ b? a-(1-b)+1 -(1-a)-b+1 (a--1) -1)+1

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?