How far would Cecil go on the tightrope if he made the following movements: 11.5 + (-7.5) HELP PLEASE!!!

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 .

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?

How can (square root of 25) ^2 be rewritten?