How does the pythagorean theorem relate to trigonometric ratios?

The graph below shows the amount of money left in the school’s desk fund, f, after d desks have been purchased. for each new desk that is purchased, by how much does the amount of money left in the school’s desk fund decrease?

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0

What is the solution to this system of equations? y= 2x - 3.5 x - 2y = -14