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/sci/ - Science & Math

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2160584 No.2160584 [Reply] [Original]

/sci/ I'm having trouble doing word problems which I'm sure most of you would consider to be no brainers. I have a test tomorrow that I'm sure will look like this and I need help figuring out how to do these things. An example of what I have here is: How many gallons of a(n) 5% salt solution must be mixed with 40 gallons of a(n) 9% solution to obtain a(n) 7% solution?

>> No.2160596

Bumping for answers.

>> No.2160605

40 gallons.

>> No.2160608

>>2160605
Can you explain how you got that answer? Id like to get some tips of how to do these kinds of problems.

>> No.2160624

Are you fucking serious? What are you, 12?

>> No.2160631
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2160631

>>2160624

>> No.2160635

Holy shit. If you really don't know how to do this, you shouldn't fall asleep in class, asshat.
Man, sophomore year is going to kick your ass.