The standard form: ax + by = c
and your equation is: -2x + 3y = - 5 (Yes this is written in standard form)
The formula of a slope:

We have the points A(-7, a) and B(c, d).
Substitute:

Exception: c ≠ -7.
You could say that, "Mr.Fuller has 2 2/3 pies left over from his party.
Answer:
193650
Step-by-step explanation:
Since the cost must be no more than 387$, you can substitute that number instead of y to get 387 = 0.002x - 0.30. you can add 0.30 to both sides to get 387.3 = 0.002x
Then you can divide both sides by 0.002 to get 387.3/0.002 = 193650