Convert 46.8 feet per second to miles per hour

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

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

What is the ratio fraction form of 25: 9