If my final is worth 15% of my mark and I'm at 83% right now, what would my mark be if my final was 60%?

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 .

The holiday party will cost $160 if 8 people attend. if there are 40 people who attend the party, how much will the holiday party cost

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex