Which shows how to use similar right triangles to find the equation of the line through (0,b) and any point, (x, y), on the line?

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

For the equations below which statement is true ?

What three-dimensional solid have 6 rectangular faces, 2 equal bases that are not rectangles and 18 edges