Sean buys 7 postcards to send to his friends. He also buys a t-shirt for $15.89 to give to his best friend. He pays a total of $19.32.Write an equation to find how much each postcard costs.

What is the value of the expression "two less than six times the diffrence of a number and five" when n = 9?

F(x)= 4x g(x) =x-1 what is f(x) divided by g(x)

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