Solve for x
x= 5
x = 18
x= 30°
x= 36
I need the answer ASAP

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 .

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

Which graph has a rate of change of zero