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e.mccormick
 one year ago
Best ResponseYou've already chosen the best response.1How far did you get with this?

ValentinaT
 one year ago
Best ResponseYou've already chosen the best response.0Hold on a second please, I'm writing.

e.mccormick
 one year ago
Best ResponseYou've already chosen the best response.1Kk. Cause I do have a path to the answer...

ValentinaT
 one year ago
Best ResponseYou've already chosen the best response.0\[\frac{ 72 }{ 2 } + \frac{ 72 }{ x } = \frac{ 72 }{ 1.5 }?\]

e.mccormick
 one year ago
Best ResponseYou've already chosen the best response.1hmm... I can see where you got the 72/2 and 72/1.5.... but the 72/x makes no sense to me.

ValentinaT
 one year ago
Best ResponseYou've already chosen the best response.0Sorry, I was looking at the example in my book, and tried to model it like it.

e.mccormick
 one year ago
Best ResponseYou've already chosen the best response.1\(c_1 cpm=\frac{72}{2}\) and \(c_2 cpm=?\) Where cpm is Copies Per Minute \(1.5(c_1 cpm+c_2 cpm)=72\)

e.mccormick
 one year ago
Best ResponseYou've already chosen the best response.1Once you know the CPM for the old copier, you can find out how long it takes to make 72 copies.

ValentinaT
 one year ago
Best ResponseYou've already chosen the best response.0Sorry, I was writing this down.

e.mccormick
 one year ago
Best ResponseYou've already chosen the best response.1Your method might actually do that in one shot, don't know. You could run it both ways and see.

ValentinaT
 one year ago
Best ResponseYou've already chosen the best response.0How do I find the cpm for the old copier? \[1.5(\frac{ 72 }{ 2 } + \frac{ 72 }{ x }) = 72\]?

e.mccormick
 one year ago
Best ResponseYou've already chosen the best response.1You just need x. Not 72/x.

ValentinaT
 one year ago
Best ResponseYou've already chosen the best response.0Okay. \[1.5(\frac{ 72 }{ 2 } + x) = 72\]

ValentinaT
 one year ago
Best ResponseYou've already chosen the best response.0Can you give me a hint on what to do next?

e.mccormick
 one year ago
Best ResponseYou've already chosen the best response.1Move the 1.5 to the other side, do the dractions. They become nice numbers.

e.mccormick
 one year ago
Best ResponseYou've already chosen the best response.1fractions... oops. I was checking the other way. It would get a very bad number.

ValentinaT
 one year ago
Best ResponseYou've already chosen the best response.0Okay. \[\frac{ 15 }{ 10 } (\frac{ 72 }{ 2 } + x) = 72\] End up with 12.

e.mccormick
 one year ago
Best ResponseYou've already chosen the best response.1My version of the work:\[1.5\left(\frac{ 72 }{ 2 } + x\right) = 72 \\ \implies \frac{ 72 }{ 2 } + x = \frac{72}{1.5} \\ \implies 36 + x = 48 \\ \implies x = 4836 \\ \implies x = 12\]So 12 copies per minute. Then the time for 72 copies is \(\frac{72}{12}\)

e.mccormick
 one year ago
Best ResponseYou've already chosen the best response.1Yah, these and riverboat problems are all about finding what is added and what is multiplied. The true goal of word problems is trying to help you figure out how math works in real life rather than just in homework.

e.mccormick
 one year ago
Best ResponseYou've already chosen the best response.1/cheer Yep. Really slow copier.
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