1. (4,1) is not a solution because when u sub it into the equation, it does not come out correct. It would be correct if it was (1,4).
2. C = 2.50d.....where C is the cost and d is the number of drinks bought. And if u pick any number for d, then u can solve for the cost (C).
A(b - c) = d
ab - ac = d
-ac = -ab + d
ac = ab - d
ac/a = (ab - d)/a
c = (ab - d)/a
Your answer will be A. c = (ab - d)/a. Hope this helps!
15/72=5/24
Divide both by three.
:)
Answer:
there is a website called desmos and you can type all of that in and it can graph it, hope that helps(: and its free
