Find the maximum and minimum values of the function for the polygonal convex set determined by the given system of inequalities. x + y ≥2
8x - 2y ≤ 16
4y ≤ 6x + 8
f (x, y) = 4x+7y

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

Determine the intercepts of the line that passes through the following points. (15,-3)(15,−3) (20,-5)(20,−5) (25,-7)(25,−7)

Me because i don't understand how to do it.: )