Need help to answer and work needs to be shown.

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?

The tile along the edge of a triangular community pool needs to be replaced? ?

3women sell hats at a craft fair weekly. the money they make at the fair is split into categories. 9% goes to pay taxes. $55 goes to pay rent for the space they sell in. the rest is split between the women. if the group make $706 at the fair, how much does each women get paid once the money is divided