At a vegetable stand, a person can buy 4 apples and 2 bags of potatoes for $9. At a farmer's market, the same person can buy 4 apples and 3 bags of potatoes for $12. Assuming the prices are the same, what is the price of each apple and each bag of potatoes? Use the matrix equation to solve the system of equations. A matrix with 2 rows and 2 columns where row 1 is 4 and 2, and row 2 is 4 and 3, multiplied by a matrix with 2 rows and 1 column where row 1 is a and row 2 is p equals a matrix with 2 rows and 1 column where row 1 is 9 and row 2 is 12