When Randy works 5 hours as a baseball umpire, he earns $77.50. When he works 18 hours, he earns $279.00. Which
equation represents Randy's earnings m for any number of
hours h?

Ineed with number 17 i don’t get it at alll

It says factor each expression 49x-28?

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?