What is the constant of proportionality in the equation: y=7x ...?

Let w = 4. enter > , < , or = to compare the expressions. 3w² + 1 10w + 8

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?

What is the mean of the data set 125, 141, 213, 155, 281