Plz
amy mixes 12 liters of 26% acid solution with a 40% acid solution to make a 33% acid solution. how many liters of 40% solution did she use
a.36 liters
b. 12 liters
c. 16 liters
d.4.8 liters
amy mixes 12 liters of 16% acid solution with a 40% acid solution to make a 32% acid solution. how many liters of 40% solution did she use?
a. 36 liters
b. 24 liters
c. 16 liters
d. 4.8 liters
marie mixes 16 liters of 18% acid solution with a 27% acid solution to make a 21% acid solution. how many liters of 27% solution did she use?
a.8 liters
b. 12 liters
c.13.7 liters
d.16 liters

1.
12 liters of 26% acid solution contain liters of acid.
x liters of 40% acid solution contain liters of acid.
The third solution is made from the two mixed solution so its volume is , and the volume of acid in it is . Its concentration is 33% or 0.33.
The concentration of a solution is the volume of the solution divide by the volume of acid in it.



The answer is B.

2.
12 liters of 16% acid solution contain liters of acid.
x liters of 40% acid solution contain liters of acid.
The volume of the third solution is , and the volume of acid in it is . Its concentration is 32% or 0.32.



The answer is B.

3.
16 liters of 18% acidsolution contain liters of acid.
x liters of 27% acid solution contain liters of acid.
The volume of the third solution is , and the volume of acid in it is . Its concentration is 21% or 0.21.



The answer is A.

A) 144.44 sq inches i believe

If i think this is what your asking, he should look at the grams or pounds/ounces and compare the to their cost then max can identify which one is proportional and which is not ( i think xd)