You are ordering a meal and have $15 to spend. the restaurant charges 6% sales tax and you plan on leaving a 15% tip. what is the maximum amount you can spend on your meal (m) before tax and tip?

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?