Answer:
44.5
Step-by-step explanation:
First know that the y=5500 is just there to confuse you. Focus on the other equation that was given to you: 9t+4. with "t" meaning years you have to plug it in- or substitute the "t" variable for 4.5 because the variable means years and 4.5 years are given- and multiply to get 40.5. Then u add 40.5 to 4 and get 44.5 as your final answer.
1) 9(4.5) + 4
2) 40.5 + 4
3) 44.5
If I'm wrong then here's a possible alternative: add 44.5 to 5500.
