Jimmys new cell phone cost him $49.99 when he signed a 2-year plan, which was 75% off the original price. what was the original price ?

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 .

5/6+7/8what is the answer sealsdbdbshd

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?