What is the value of the expression below when y=6y=6?
6y-1
6y−1

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?

Yvaries inversely as x. y =12 when x=5. find y when x=4

Given abc find the values of x and y. in your final answer, include all of your calculations.