Steve built a square dog pen that has a perimeter of 240 inches. what is the length of one side of steve's dog pen?

Me with this one question, and i'll upvote the brainliest answer

Apublic library wants to place 4 magazines and 9 books on each display shelf. the expression 4s+9s represents the total number of items that will be displayed on s shelves. simplify the expression

1.two more than the quotient of a number and 6 is equal to 7 use the c for the unknown number translate the sentence into an equation