4. the larger of two numbers is 10 less than twice the smaller number. if the sum of the
two numbers is 38, find the numbers.

What expression is equivalent to log3(x+4)

If i have 20$ and i gave 5$ away how much i got

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?