Help? I give points also this work is due tomorrow and I really need help

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.

Find the value of x. give reasons to justify your solutions! c ∈ ae

Write an inequality for this description. - one fourth of the opposite of the difference of five and a number is less than twenty.