How do you work out the size of angle x ?

#12 find the value of x. #13 find the value of the variable.

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

Landon wrote that 3−2.6=4. which statement about his answer is true?