To find the total amount Samuel spent at the farmers market on both days, we can break it down as follows:
First day:
- He bought 3 pounds of apples for \(x\) dollars per pound: \[ 3x \]
- He bought 2 bags of spinach for \(y\) dollars each: \[ 2y \]
- Therefore, the total spent on the first day is: \[ 3x + 2y \]
Second day:
- He bought 5 pounds of apples for \(x\) dollars per pound: \[ 5x \]
- He bought 3 bags of spinach for \(y\) dollars each: \[ 3y \]
- Therefore, the total spent on the second day is: \[ 5x + 3y \]
Total spent on both days: Now, we can add the total from both days: \[ (3x + 2y) + (5x + 3y) = 3x + 5x + 2y + 3y = 8x + 5y \]
Thus, the expression representing the total amount he spent at the market on both days is: \[ \boxed{8x + 5y} \]