I'm sorry but your photo doesn't really show the whole paragraph clearly so I can't answer
Answer:
28 1/8 weed killer
47.8125 weed killer
Step-by-step explanation:
22 1/2 divided by 4/5
38 1/4 divided by 4/5
he will have to buy 48 3/5 quarts
Answer:
Alex can do the job in 60 days alone.
Step-by-step explanation:
Alex and Brandon working together, they can finish the job of cleaning the school in 15 hours. Brandon alone in 20 hours can finish the job.
So, Brandon can complete
part of the job in one hour.
Let, Alex alone can finish the same job in x hours.
So, Alex can complete
part of the job in one hour.
So, working together they do
part of the whole job in one hour.
Hence, from the conditions given we can write

⇒ 15x + 300 = 20x
⇒ 5x = 300
⇒ x = 60 days.
Therefore, Alex can do the job in 60 days alone. (Answer)
Answer:
Olga's mistake: She did not multiply
and
in the beginning
Step-by-step explanation:
The main problem is that when a number is outside of the parentheses on the left side, then you have to multiply that number, in this case
, by both numbers in the parentheses. After that, continue solving the problem as you usually would. Hope this helped!