Answer:
"4.71" is the correct answer.
Step-by-step explanation:
As we know, 45 envelopes addressed in 2 hours then,
⇒ 
and, 45 in 3 hours,
⇒ 
Now by adding all together, we get
⇒ 
⇒ 
and multiply it by "4.71", we get
⇒ 
⇒ 
Round it "310".
So that "4.71" is the right answer.
Answer:
aquí está
Step-by-step explanation:
- 7x+3-6x=6x-3-6x
- x+3=-3
- x+3-3=-3-3
- x=-6