Question

Madison is making a cleaning solution by mixing a multi-surface cleaner with water in the

ratio of 2 to 11. How many pints of the
cleaner and water does she need to make 39 pints of solution?
Cleaner:

Answer 1

Im pretty sure its 33 and 6

Explanation:

Answer 2

Explanation:

Set up a proportion

2/13 = x / 39 Cross multiply

13*x = 2 * 39 Combine the right

13x = 78 Divide by 13

x = 78/13

x = 6

Why pick 13? Because the total must come to 39. You will make a mistake if you use 11 rather than 13. You must include the cleaner in the denominator. Very tricky question.

So the final answer is

Cleaner: 6

Water: 39 - 6 = 33 pints of water.

Very few of your classmates will get this if they are not in chemistry. You might even be told your answer is incorrect. It isn't.