Of the following, which is not a solution to the differential equation y′′′+4y′=0 ?

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

Follow these steps using the algebra tiles to solve the equation −5x + (−2) = −2x + 4. 1. add 5 positive x-tiles to both sides and create zero pairs. 2. add 4 negative unit tiles to both sides and create zero pairs. 3. divide the unit tiles evenly among the x-tiles. x =

How do you solving the solution of each system using elimination?