Help plz (I GIVE VIRTUAL COOKIES)

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

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?

Which equation can be simplified to find the inverse of y = 2x2^2