Plz help me well mark brainliest if you are correct!..

Answer:
15x + 30y - 220
Step-by-step explanation:
30(1/2 x - 2) + 40(3/4 y - 4) =
= 30(1/2 x) - 30(2) + 40(3/4 y) - 40(4)
= 15x - 60 + 30y - 160
= 15x + 30y - 220