Answer:
1100 - 0.04x
Step-by-step explanation:
0.07x + 0.11(10,000 - x)
0.07x - 0.11x +1100
-0.04x + 1100
a) 4:7:3
b) 4:7 / 20:35
c) 3:7 / 15:35
Answer: -72x+45y+72
