Answer:
4a + 3d + 15
Step-by-step explanation:
Remove parentheses.
3d + 9 + 4a + 6
Add 9 and 6.
3d + 4a + 15
Reorder 3d and 4a.
Initial: 25 40 60
Year 10: 25.70 40.50 60.25
Year 20: 27.45 42.70 64.50
first option
Always remember to graph a diagram :)
