1. At a coffee shop, a 16 ounce bag of coffee is on
sale at $5.25 less than the regular price. The cost
of 4 bags of coffee at regular price is the same as
the cost of 6 bags of coffee at sale price. Letr be
the regular price of coffee and s be the sale price
of coffee. Which of the following systems of
equations can be used to find the values of
variables r and s?