Angel has xx nickels and yy dimes. He has a maximum of 22 coins worth a minimum of $1.40 combined. Solve this system of inequalities graphically and determine one possible solution.

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?

Abcd is a square. what is the measure of angle bac

The ratio of the perimeters of two similar triangles is 4: 3. what are the areas of these triangles if the sum of their areas is 130cm2?