12) A survey found that 60% of the people by used cars. If a car dealership has 3,500 car buyers, predict how many buyers purchased a used car.

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.