A student has a 2% salt water solution and a 7% salt water solution. To best imitate salt water at a local beach, he needs 1 liter of a 3.5% salt water solution. He defines x as the amount of 2% solution and writes this equation: 0.2x + 0.7(x – 1) = 0.35(1) He solves the equation and determines that x is about 1.17 liters. He interprets this as needing 1.17 liters of 2% solution to make 1 liter of 3.5% solution.
Answers
Answered by
1
Answer:
The equation is incorrect
Step-by-step explanation:
The equation was incorrect, it should have been:
(0.02x+0.07 (1-x)) = 0.035
.02x+.07-.07x=.035
-.05x=-.035
x=.7
So he will need 700ml of 2% mixed with 300ml of 7% to make 1000ml of 3.5%
Similar questions