Write three different expressions that can be simplified to x to the sixth power?

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?

You can ride your bike around your block 6 times and the whole neighborhood 5 times in 16 minutes. you can ride your bike around your block 3 times and the whole neighborhood 10 times in 23 minutes. how long does it take you to ride around the neighborhood?

Factor the polynomial by its greatest common monomial factor.