Maria bought some fruit for her picnic. She bought apples and bananas. Each apple cost dollars, and each banana cost dollars. On Monday, she bought 3 apples and 2 bananas for a total of $7.00. On Tuesday, she bought 5 apples and 1 banana for a total of $8.00. Which system of equations can be used to correctly determine the values of and ?
3a + 2b = 7
5a + b = 8
3a + 5a = 7
2b + b = 8
2a + 3b = 7
b + 5a = 8
a + b = 7
a + b = 8
