Michelle orders cupcakes that comes in a cardboard box the box has the dimensions shown 10 inches 11 inches and 9 inches

#12 find the value of x. #13 find the value of the variable.

Which shows the pre image of triangle xyz

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?