Bob and Nina make dog leashes. Bob can make 7 leashes in 2 hours and Nina can make 4 leashes in 1 hour. Enter an equation that can be used to find the number of hours, t, it takes Bob and Nina to make 60 leashes together. Enter your response in the first response box.. Enter the number of hours, t, it takes Bob and Nina to make 60 leashes together. Enter your response in the second response box.