Answer:
[tex]15x + 30y - 220[/tex]
Step-by-step explanation:
[tex](30 \times \frac{1}{2} x ) + (30 \times - 2) + (40 \times \frac{3}{4} y )+( 40 \times - 4)[/tex]
[tex] = 15x - 60 + 30y - 160[/tex]
[tex] = 15x + 30y - 60 - 160 \\ = 15x + 30y - 220[/tex]
