Each letter stands for a different digit. Find the digits.
XY+3= XZ
XYx3= ZX

What digits are X, Y & Z?

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

Compare the cost of the bike trips from the two companies shown. for both the cost in a linear function of the number of days which statements is true

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?