What are the coordinates of the image of (3,5) after a counter clockwise rotation of 90° about the origin?

Simply 8x squared + 5(7x squared- x) - 2x =

What line represents the relationship between r and s

Why can't my rank go i have 1723 points, but my rank is only at ambitious, which is only 250 points! like, (p.s. i know this isn't related to math, but i just don't know why it's doing this and i would really appreciate if someone could tell me whats going on with this)