Help please!! I’ll give brainliest.

Examine this system of equations. what integer should the second equation be multiplied by so that when the two equations are added together, the x term is eliminated? 3/4x+1/7y=6 1/8x-3/5y=16

If f(x)=1/x and g(x)=x+4 which of the following is the graph

What is the expression equivalent to (3x^2-7)