John's coffee shop makes a blend that is a mixture of two types of coffee. type a coffee costs john $4.70 per pound, and type b coffee costs $5.90 per pound. this month, john made 181 pounds of the blend, for a total cost of $967.10 . how many pounds of type a coffee did he use?

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.