What is the value of cos(150°)?

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 .

Identify the number 127 as a rational or irrational. explain

Kira looked through online census information to determine the overage number of people living in the homes in her city what is true about kira's data collection?