Mary is 19 years younger than Jordan. Sarah is 49. Leo is 11 years younger than Sarah and 3 years younger than Jordan. How old is Mary?

What is the value with a place of tenths in 907.456 1) 0 2) 6 3) 4 4) 5

Which value would be a solution for x in the inequality 47-4x< 7

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?