find the missing side lengths answers are in simplest radical form with the denominator rationalized​.​

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

Donald has x twenty-dollar bills and 11 ten-dollar bill. how much money does donald have? write your answer as an expression.