Two welders working together they can complete a job in six hours. One of the welders, working alone, can complete the task in nine hours. How long will it take the second world at work in alone to complete the task

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.

If x = -2, then x 2-7x+10 equals a. 0 b.20 c.28

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?