$112.50 is the new retail price for the shoes
We can find this out by taking the total (23.70) and dividing it by the 5 band members, getting the number 4.74. Now we do this again, but with the extra band member we get 3.95. Now the last step it 4.74 - 3.95, which is 0.79. So each band member payed 0.79 less than normal.
We need to isolate "y" in order to find the slope-intercept form.
Thus, we need to multiply by 2 on both sides.
y=2x+12
The equation for slope-intercept is:
y=mx+b, where m is the slope.
Thus the slope of a line parallel to 1/2y=x+6 is 2.