I need help in this!

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.)

Select all of the following expressions that are equal to 2.5.

Atriangle has side lengths of x, x+11, and 3x+5. what is the perimeter?