1. Y = 10x
2. Y = 100 + 30x
3. Y = 50 + 1x
5. Y = 15 + .12x
The answer is B since he bought 4 in all it is x+y =4 . x=dvd y= blue ray discs .
so 2x + 5y =11
2x since dvds are $2
5y since blue ray discs are $5
11 since that’s the total
X = 3
5(3) - 2 = 13
3(3) + 4 = 13
Hi there! My Name is Alex! The Answer to your question is listed Below Hope this helps!
Answer:

How to Solve For Slope Intercept Form...
The equation for slope-intercept form is: y=mx+b In this form, m is the slope of the line and the b is the y-intercept.