How many numbers must be selected from the set {1,2,3,4,5,6,7,8,9,10,11,12,13,14}{ 1,2,3,4,5,6,7,8,9,10,11,12,13,14} to guarantee that at least one pair of these numbers add up to 1515

There is a line with slope 1/a going through the point (a, a²). find the equation of the line perpendicular to this line at this point. (don’t let this problem intimidate you! solve the problem as you would if i’d given you specific values. just use variables instead.)

I’m stuck on this equation, anyone got the answer?

Me! i will mark you brainliest if you are right and show your i don't get polynomials and all the other stuff. multiply and simplify.2x(^2)y(^3)z(^2) · 4xy(^4)x(^2)show your