To determine how much money Rick has altogether after his transactions, we can break down the steps he needs to take:
1. Rick starts with [tex]$680.
2. He spends $[/tex]240 on plane tickets.
3. His friend gives him an additional [tex]$50 for his trip.
We need to figure out the correct sequence of entries on Rick's calculator to find his current total amount of money.
Let’s go step-by-step:
- Rick starts with $[/tex]680, which means we begin with the number 680.
- Rick spends [tex]$240 on plane tickets, which means we subtract 240 from 680.
- Rick’s friend then gives him $[/tex]50, which means we add 50 to the result of the previous subtraction.
Putting these steps together, the mathematical operations would be entered into the calculator in the following sequence:
[tex]\[ 680 - 240 + 50 \][/tex]
Thus, the correct series of calculator entries that mirrors these operations is:
[tex]\[ [ON/C] [680] [-] [240] [+] [50] \][/tex]
So, the correct choice is:
[tex]\[ \boxed{[ON/C] [680] [-] [240] [+] [50]} \][/tex]
