Jonathan has 30 chocolates. he gives some chocolates to his friend david. he then gives sarah half the number of chocolates that he gave david and gives lily two-thirds of what he gave david. after giving away the chocolates, jonathan has 4 chocolates left. if the number of chocolates jonathan gives david is x, which equation represents the situation? how many solutions does this equation have?

You coordinate volunteers for litter cleanup in local parks. your spreadsheet lists drivers and the number of seat belts in each driver’s car. the spreadsheet calculates the number of drivers (d) and the total number of seat belts (s). you want to know the maximum number of volunteers, besides drivers, that can be transported to the park in a single trip given that each person must have a seat belt of their own.