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Young Writers Society


I need help with my math adfghjkl.



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Fri Apr 30, 2021 2:58 pm
fatherfig says...



feel free to explain to me how you are supposed to answer these.
Last edited by fatherfig on Fri Apr 30, 2021 3:12 pm, edited 1 time in total.
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Fri Apr 30, 2021 3:08 pm
fatherfig says...



asdfghjkl ;-;
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Fri Apr 30, 2021 3:29 pm
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Hijinks says...



This is another division problem which means we get to do the fancy ole flip a fraction and change the sign trick :)

That gets us: (x-1)/6xy * 2y/5

Now we multiply the two top numbers together and the two bottom numbers together.

top numbers: (x-1) * 2y = 2xy - 2y

bottom numbers: 6xy * 5 = 30xy

That means our new, single fraction, is: (2xy-2y)/30xy

We can simplify this by finding the one thing they all have in common (2y) and dividing each expression by 2y.

This gets (x - 1)/15x -> the second option!

Lemme know if you have any questions ^^
When you're faced with something you don't understand, I think the most natural thing but also least interesting thing you can be is afraid.

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Fri Apr 30, 2021 3:36 pm
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fatherfig says...



thank you @whatchamacallit that was helpful ^^

do you know how i would go about solving this?
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Fri Apr 30, 2021 3:43 pm
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Hijinks says...



We want to find the expression where the numerator of fraction 1 = denominator of fraction 2, AND the denominator of fraction 1 = numerator of fraction 2.

In other words, regardless of what x and y stand for, it should look like
(x/y)(y/x)

That way, we can simplify all the expressions to be (1/1)(1/1) -> (1)(1) -> 1.
When you're faced with something you don't understand, I think the most natural thing but also least interesting thing you can be is afraid.

-- Hank Green

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Fri Apr 30, 2021 3:47 pm
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fatherfig says...



so it would be B right? or did i misunderstand you?
"i dont slay i slaughter, luke i am your father..." ~fatherfig
  





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Fri Apr 30, 2021 3:48 pm
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Hijinks says...



yup yup exactly! B's the answer ^^
When you're faced with something you don't understand, I think the most natural thing but also least interesting thing you can be is afraid.

-- Hank Green

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Fri Apr 30, 2021 3:55 pm
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fatherfig says...



[ASDFGHJKL I UNDERSTOOD THAT THANK YOU <333


this one stumped me bc i was doing to quotient ones i understood (due to your awesome teaching skills) while i was waiting, but it seemed more complex and confused me, do you do the same thing?
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Fri Apr 30, 2021 4:02 pm
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NivedaJames22 says...



You have to use the same logic gem...you flip the fraction, and then simplify.

Spoiler! :
the answer is 32 m*15/x^3+x^2
Clumsy, clumsy, clumsy, she berated herself.

"To friendship!" they had toasted, before downing their respective drinks and acquiring thick chocolatey moustaches.
  





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Fri Apr 30, 2021 4:06 pm
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Hijinks says...



AWW I'M GLAD MY EXPLANATIONS MAKE SENSE <3

Hmm so when we do the flippity-trickity we get: 4m^12/(x+1) * 8m^3/x^2

There isn't anything in common between the numerator of 1 and the denominator of 2 or vice versa, so we can't do the simplify or cross-out trick here. That means we just have to multiply the numerators and the denominators as they are.

numerators: 4m^12 * 8m^3 = 32m^15

denominators: (x + 1) * x^2 = x^3 + x^2

smush 'em back together and we get: 32m^15/(x^3 + x^2), or option #4!




edit: oops didn't see Niv's response ^^
When you're faced with something you don't understand, I think the most natural thing but also least interesting thing you can be is afraid.

-- Hank Green

they/them
(previously whatchamacallit and Seirre)
  








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