(Please help) A family purchased several brownies and cookies for $48. The number of cookies they purchased was 4 less than the
number of brownies they purchased. Brownies are $5 each and cookies are $9 each. Determine how many cookies and brownies they purchased. (System of Equations)
The 19.485 is the slope of the graph of this equation. This gives the rate of change of the amount of the bill (above $86.912) for each added resident (x).