Is 10 a rational number?

In the 30-60-90 triangle below side s has a length of and side r has a length

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.

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*