8 years because its uses 100l per load and you wash 100 per year you multiply and get 10,000 which divided by 1,00 its 10 so 10 x 5 = 50 so you save 50 per year and its 400 dollars more so 50 x 8 years will be 400
Answer:
200
Step-by-step explanation:
balancing it with 120 is 76 so this what you get
P-Q should be -11a^2+4b^2+ab