Use each picture or description of a triangle, write and solve an equation in order to find the number of degrees in each angle

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?

A(1,1) b(-3,0) c(-4,-1) d(3,-2) drag it to correct position

What is the area of the original rectangle? 8 cm² 20 cm² 25 cm² 40 cm²