Answer:
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Step-by-step explanation:
Answer:
y = 3x -7
Step-by-step explanation:
The 2-point form of the equation of a line is useful for this.
y = (y2 -y1)/(x2 -x1)(x -x1) +y1
y = (-1 -(-4))/(2 -1)(x -1) -4
y = 3(x -1) -4
y = 3x -7
Let c=ice cream and p=pie
3c-20=p
p+c=500
Substitute for p.
p=130 and c=370