Me for number 8 tell me the answer for number 8 surface area

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out

Describe a situation that you could represent with the inequality x< 17

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?