The critical points of a rational inequality are x = -4 and x = 2. Which set of points can be tested to find a complete solution to
the inequality?
OO
x=4 and x = 2
x= -5 and x = 3
x=-5, x = 0, and x = 3
x= 4, x = 0, and x = 2

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?

Mat bought a phone for $100. he has to pay $30 per mouth. if he has paid $640 in total, how many mouth has he had the phone?

Convert the mixed numbers into improper fractions. convert the improper fraction to mixed numbers.