Question 22·Easy·Systems of Two Linear Equations in Two Variables

At a farmers market, Carly buys only apples and bananas.

• On Monday, she buys 4 apples and 6 bananas for a total cost of $3.80.
• On Friday, she buys 7 apples and 3 bananas for a total cost of $4.25.

Let $a$ be the cost of one apple, in dollars, and $b$ be the cost of one banana, in dollars.

Which system of equations can be used to determine the values of $a$ and $b$?