Which of the following numbers makes a right triangle? 5, 12, 13
5, 12, 13

11, 11, 22
11, 11, 22

3, 5, 9
3, 5, 9

10, 5, 8

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?

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?