A certain company changes for teling a rectangular room include the cost of the material used and a flat rate of instalitation. Te lenght of certain room is 2 fett more than with, and the company's chrages, in dollars, for tiling the room are 12.5x(x+2)+400

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.)

The area of a 25-inch tv screen is 300 square inches. the area of a 40-inch tv screen is 768 square inches. the are of the smaller screen is what percent of the area of the larger screen?

Quick translate "x is 12 units from 20" into an equation. what are the values of x being described? if you can answer any of my other questions that'd be great too