Find the missing values: 7,200\80=(7,200/x) /x

this is for my fifth grade brother, i’m literally a sophomore and don’t know how to do it so pl help find answer and explain

If there is no real number solution to the quadratic equation x^2+2x+c=0 what is a possible value of c? 1 -2 0 3

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

How far could you drive on 50 gallons of gas