Three of four numbers have a sum of 22. if the average of the four numbers is 8, what is the fourth number? don't just answer, tell me how to answer. i think i just need setting up the correct equation

What is the fewest number of full weeks briyana would have to work to have enough money? 8 weeks9 weeks 10 weeks11 weeks

You dug a hole that was 8 feet deep. after taking a short break, you dug down 3 more feet in the same hole. when finished digging, a tractor accidentally filled the hole with 4 feet of dirt. how deep is your hole now?

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.