i need help with this and my teacher isnt explaining it that well could someone explain it to me in a better way

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

Plz ( true - false) all triangles have interior angles whose measure sum to 90.

James is playing his favorite game at the arcade. after playing the game 33 times, he has 88 tokens remaining. he initially had 2020 tokens, and the game costs the same number of tokens each time. the number tt of tokens james has is a function of gg, the number of games he plays