Estimate the answer of -6 3/5 - (-7 4/15) +2 1/5

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?

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?