To model this situation with a pair of linear equations, we first need to establish what the variables represent.
Let:
- \( p \) be the number of members picking up litter.
- \( c \) be the number of members cleaning the hallways.
There are two main equations we can derive from the problem description:
-
The total number of members participating is 25, so: \[ p + c = 25 \]
-
The total amount earned needs to be $300. Members earn $15 for picking up litter and $10 for cleaning hallways, so: \[ 15p + 10c = 300 \]
Thus, the correct pair of linear equations that models this situation is:
- \( p + c = 25 \)
- \( 15p + 10c = 300 \)
This corresponds to the option:
- \( p+c=25 \); \( 15p+10c=300 \)
So, the response is: p plus c equals 25; 15 p plus 10 c equals 300.