I need help on this

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

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.

In the diagram of circle o, what is the measure of zabc?