This is a question related to Science dear!
Joseph would have 81 quarts of fertilizer left
Answer:
-150
Step-by-step explanation:
Multiply & Divide left to right

Once again Multiply & Divide

Add & Subtract
Final Answer: 
Answer:126
Step-by-step explanation: your welcome
Let y directly proportional to X
thus y = CX
where c is proportionality constant
given c= 9
thus y = 9x