You want to put 520 quarters in coin wrappers. you need one wrapper for every $10 in quarters. write an equation you can use to find how many wrappers you need

Iam trying to solve a linear equation for the shoe size of someone 84" tall taking into consideration example 1 is 69" tall with a shoe size of 9 and example 2 is 72 inches tall with a shoe size of 11. i understand that the equation should be y=mx+b and that on the graph the answer is (3,2) but i just don't understand how to create the equation to solve for 84-inches and 60-inches tall questions. after two days, i need .

We just started the introduction into circles and i have no idea how to do this.

Identify the number 127 as a rational or irrational. explain