The blue dot is at what value on the number line

Is the point (0, 8) on the x-axis or y-axis? how do you know?

To decrease an amount by 16% what single multiplier would you use

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