If y = 3x + 6 and y = x −10, at which point do the lines intersect?

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 .

Find the average speed of a rabbit that runs a distance of 22 m in a time of 1.8 s .

If the simple annual interest rate on a loan is 6, what is the interest rate in percentage per month?