Sheldon is four years older than his brother lee. togethet the boys are at most 26 years old. the inequality c+(c+4) is less or equal 26 can be used to determine the ages of boys. what does (c+4) represent? if lee is 5 years old how old is sheldon? if lee is 5years old what is the combine age of sheldon and lee? can lee be older than 11 years old?

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?