3.14? It may work different here.
Answer:
Step-by-step explanation:
- x² + 6x - 3 = 0
- x² + 2*3*x + 3² - 3 = 3²
- (x + 3)² = 12
- x + 3 = ± √12
- x + 3 = ± 2√3
- x = 2.196, x = -8.196
Let be the number of liters of the 10% solution she needs to use. She'd end up with a 6% solution with a volume of liters. The starting solution contains 0.04*9 = 0.36 liter of salt. Each liter of the 10% solution contributes 0.1 liter of salt, so that
Solve for :
so Mayra needs to add 4.5 liters of the 10% solution.