which two ratios represents quantities that are proportional. A: 5/7 and 7/14 B: 21/28 and 12/16 C: 9/10 and 10/9 D: 56/64 and 36/48

Find the missing part. use an improper fraction for your answer.

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).

Aubrey read 29 books and eli read 52 books what number is equal to the number of books aubrey read?