Solve this 1) Subtract the sum of 12xy -10y² - 18x² and 8xy + 2y²- 4x² from the sum of xy + 5x² and 2y². Write the coefficients of the terms from the difference?

Provide an example of a trigonometric function and describe how it is transformed from the standard trigonometric function f(x) = sin x, f(x) = cos x, or f(x) tan x using key features.

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?

Can someone explain to me how to do