G -2/2 Simplify the variable expression by evaluating its numerical part

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.

Me i’m stuck on all these questions besides the two bottom ones

Brent paid for 6 avocados with a $20.00 bill. he received $10.40 in change. construct and solve an equation can be used to find the price , of each avocados