Question

A 20% acid solution is mixed with a 70% acid solution to get 50 liters of a 40% solution. Which of the following expressions is equal to 4(50)?

A.) 0.2x + 0.7y
B.) 2x + 7y
C.) x + y

Answer 1

C.) x + y hope this helps

Answer 2

The answer is 20%(x) +70%(y)
Then you change the percent to decimal

The answer is A. .2x+.7y