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Proportional relationships

Sal determines which ratios are proportionate to a ratio provided in a context.

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• So... Is it just me or I don't get this at all. :/
• I can't get this either.
• I still don't get how 6x0.25 is 1.5
• When you think about it, 0.25 is the same as 1/4, just as a different form. So if you multiply it the fraction way : 6/1 x 1/4, we get 6/4. As a decimal, 6/4 is the same as 1.5

If I'm confused about these type of questions, I use this method. So I hope you find this helpful!
• can we replay the video?
• Yes you can. Their is a replay button on the bottom left corner of the video screen.
• I divide
12 / 3=4
6 / 1.5 =4
3 / .75=4
• That is correct :)
(1 vote)
• when you think about 0.50 is it the same as 2/4
• it is the same as 2/4
• For those who don’t understand the problem, here’s a simpler explanation, hope this helps!
1. To solve the problem it is vital to understand that every time you add 15 mL of bleach to the solution you have to add 3.75 L of water.
2. We want to know how much water (L) to add when the amount of bleach (mL) we add changes, the first thing to do is to determine how much water to add per milliliter of bleach. ➡️ 15 mL (bleach) / 3.75 L (water) = 1 mL (bleach) / 0.25 L (water). Why? I divided the denominator and nominator by 15 because that way I would know how much water to put per mL of bleach.
3. Now I know that for every 1 mL of bleach Mael adds, he must add 0.25 L of water.
4. Case #1 — If we have 12mL of bleach in the solution should Mael add 3 mL of water?

1 mL bleach / 0.25 L water ➡️ multiply the nominator and denominator by 12 to find how much water should Mael add when there’s 12 mL of bleach ➡️ 1 x 12 = 12 mL bleach / 0.25 x 12 = 3 L water

• These are linear equations, which has a to do with the coordinate plane, KA's Get Ready for Geometry course has a unit that that could help you understand this better if you or anyone else are still wondering.
• type awesome on your keyboard when watching the video