Will give brainleist 50 points plz help

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 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.

Lines b and c are parallel. what is the measure of 2? m2 = 31° m2 = 50° m2 = 120° m2 = 130°