Tara can type 20 words per minute faster than Steve. Their combined typing speed is 130 words per minute.
Write and solve an equation to find both Tara and
Steve's typing speed.

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.