contestada

please please help!!!
Katie needs 60 mL of a 10% acid solution for a science experiment. She has available a 8% solution and a 20% solution.
How many milliliters of the 8% solution and how many milliliters of the 20% solution should she mix to make the 10%
solution?

Respuesta :

Genevieve7Star

Answer:

The solution would be to solve two equations simultaneously.

Step-by-step explanation:

The solution would be to solve two equations simultaneously.

So let X = ml of 8 % SOLUTION and Y = ml of 20 % SOLUTION

We know that X + Y must = 60 ml.

So first equation is X + Y = 60

The second equation is the statement of the problem

0.2 X + 0.08 Y = 0.1 x 60 = 6

Second equation reduces to

0.2 X + 0.08 Y = 6

Solve the two equations for X and Y and you have your answer.