At a pizza eating contest davonne ate two more than twice as many slices as the runner-up. if davone ate 11 slices how many slices did the runner-up eat

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog

Ineed with question three. i don't understand how i'm supposed to achieve 3 marks.

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.