Use substitution. What is the solution of the system of equations? Explain. (2 points) x y= 2 1 +2 y x 2 = +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?

If f(x)=x+7 and g(x)=1/x what is (fog)(x)

Siri can type 90 words in 40 minutes about how many words would you expect her to type in 10 minutes at this rate