What is the mean absolute deviation for this set 65 95 85 70 70 95 55

What is the point-slope form of the equation for the line with a slope of -2 that passes through (1,4)?

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?

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?