Two ice cream shops in the mall sell sundaes. let x equal the number of scoops of ice cream. larry's ice cream shops price is represented by the expression 1.2x + 1. ice cream worlds price is represented by the expression 0.4(0.3x + 1). which statement is true?

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?