Dont put random stuff .

Which expression is equivalent to (9x - 3 1/ + 1 3/8)

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

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.