Add and Subtract Rational Expressions with a Common Denominator In the following exercises, perform the indicated operations

Ateacher noticed 5/8 of the students were wearing either blue shorts or white shorts. write two different ways this could be done.

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).

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.