school help: i have another maths problem… - Help.com



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i have another maths problem…

at a hair dressers, there are two solutions of salt and water (for bleaching hair). one is 3% salt and the other is 30% salt. What is the ratio of the two solutions that i should mix to make a 12% solution. pleeeeeease help!!!

This open post was written 2 months, 1 week ago | V/U/S: 154, 2, 3 | Edit Post | Leave a reply | Report Post


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Anonymous #
2 months, 1 week ago (20 minutes after post)

4:1… but im not sure

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strav00 offline Verified User (2 months, 1 week) Shouts: 0 #
An Unknown Location | 2 months, 1 week ago (1 hour after post)

you’ve got a problem

Here’s how you set it up.

I always like to pretend I’m adding it to 1L bowl.
You need 12 units of salt.
so, if x is the amount of 3% you add
.03x+.3(1-x)=.12
if you work it out x=2/3, so 2:1

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