Answer:
425 milliliters of compound A are needed
Step-by-step explanation:
We were told that 
milliliters of compound A and 
milliliters of compound B is needed to make the drug.
This means that each drug contains 11 milliliters of both compounds.
milliliters is the volume of each drug.
Therefore the chemist needed 
millilirteres of compound A.
I believe your answer is -220w-22
2-3(2w+1)=7w-3(7+w)
+7w -7w
2-3(9w+1)=-3(7+w)
+w -w
2-3(10w+1)=-3(7)
2-3(10w+1)=-21
-1(10w+1=-21
-21 +21
-22(10w+1)
-220w-22
Reverse the sign of each term you are subtracting and then add as usual. Hope this helps!
Answer: i cannot see anything take a closer picture
Step-by-step explanation:
