Can someone give me one example of a rational number and state why it is rational. then give an example of an irrational numbers and state why it is a irrational.

3x + 4y = 5 x- 3y = -7 solve by substitution

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)

What is the distance between the points (2, 5) and (5,9)?