Answer:
6n+2.5
Explanation:
Right of the bat you would combine like terms
2n + 1.75n + 2.25n +2.5
= (2n+1.75n+2.25n) + (2.5)
Once you add up the numbers with the variable next to it your final answer should be ---> 6n+2.5
*The reason why we can't add these is because the 6 has an (n) next to it and 2.5 is a decimal number (in other words they are NOT like terms)
Hope this helps!