Someone solve this quick please

What is the value of x? enter your answer in the box. photo attached.

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

Fred has a spinner that is split into four equal sections: red, blue, green, and yellow. fred spun the spinner 688 times. which of the following would be a good estimate of the number of times the spinner lands on the green section? a. 269 b. 603 c. 344 d. 189