11. william has a pair of identical number cubes. the faces of each cube are numbered i through 6. william will roll the cubes one time. what is the probability that the numbers showing face- up after the roll will have a sum of 9?

Answer this question, only if you know the answer. 30 points and brainliest!

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

1- is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis. 2- 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. 3- 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 part b?