Convert the following from standard notation to scientific notation: 54789.21

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test

If f(x) = 4x - 3 and g(x) = x + 4, find (f - g) (x)