I dont know I would.ask the teacher
Answer:
Yaa it's true
Step-by-step explanation:
-56=-56
from both side u get the same answer
Sometimes because it might not always be true
3.5 hours
490 - 210 (for parts) = 280
280 / 80 (labor fee) = 3.5
Percent is simply /100, so the fraction would be 450/100. Divide both top and bottom and you will get 9/2, or 4 1/2