Answer:
The third option
Step-by-step explanation:
This is because you plug in 1 as a test into each of the equations and see if it equals to 12.25. It works for the third option. To verify that you can also plug in different x values and see if they match the y value.
4 big mice and 3 small mice because 4 X 25=100; 3 X 10=30
100+30=130
is that right?