Please help. I will give Brainliest
Simplify: 3 + 7 * 4

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

What is the value of f(x) = 2.2 for f(-2)?

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?