What is amount spent on each visit to the smoothie shop?

What is the missing step in this proof ?

Determine if the equation defines y as a function of x: 2xy = 1. yes o no

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (–4, 0) and (6, 0). the y-intercept of the first parabola is (0, –12). the y-intercept of the second parabola is (0, –24). what is the positive difference between the a values for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth