Andrea has 800L of acid solution. She obtained it by mixing some 7 % acid with some 10 % acid. Her final mixture of 800L is 9.25 % acid. How much of the 7 % and 10 % solutions did she use to make her final mixture?

Question

Mathematics

Connor Branch

2 October, 22:14

Andrea has 800L of acid solution. She obtained it by mixing some 7 % acid with some 10 % acid. Her final mixture of 800L is 9.25 % acid. How much of the 7 % and 10 % solutions did she use to make her final mixture?

+5

Answers (1)

Know the Answer?

Brielle Gilmore · Answer 1

600,200

Step-by-step explanation:

so we need 74L of acid and there is 800L of solution and we get the equation 0.1x+0.07y=74 and x+y=800 so we get x=600 and y=200