The state of Arizona did a random sample of the weight of 15 year-old boys. The 10 boys they sampled had a total weight of 1250 pounds. What is the best guess (point estimate) for the
average weight of 15 year-old boys in Arizona?

What is the inverse of the function f(x)=4x+8

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 .

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15