Use geometric series to express 0.555 = 0.5 as a rational number .

Is 5 a positive rational number?

0.4bar27 represents the rational number

sqrt15/sqrt3 is written is the form p/q, qne0 and it is a rational number.

Which of these are negative rational numbers? 0

Which of these are negative rational numbers? 5/7

Which of these are negative rational numbers? 3/-5

Let r be a rational number and x be an irrational number. Use proof by contradiction to show that r + x is an irrational number.