Mr. frankel bought 7 tickets to a puppet show and spent $43. he bought a combination of child tickets for $4 each and adult tickets for $9 each. which system of equations below will determine the number of adult tickets, a, and the number of child tickets, c, he bought?

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.