Monue jfhhfe is 45 times 77

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

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?

Find solution of the linear equation y = 2/3x + 1/3