To stimulate his son in the pursuit of problem solving, a math professor offered to pay him $8 for every problem solved correctley and to fine him $5 dollars for every incorrect solution at the end of the first 26 problems neither owed any money to one another how many problems were solved correctly and how many were not

Astore has clearance items that have been marked down by 60%. they are having a sale, advertising an additional 55% off clearance items. what percent of the original price do you end up paying?

What are the coordinates of the point that is 1/3 of the way from a to b? a (2,-3) b (2,6)

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?