anonymous
  • anonymous
Question down below, will award a medal.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
anonymous
  • anonymous
@Nnesha
anonymous
  • anonymous
I had gotten 4=10*25

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More answers

anonymous
  • anonymous
How would I find y if x=25?
anonymous
  • anonymous
How do I solve this problem? @freckles
anonymous
  • anonymous
I'm not really understanding.
freckles
  • freckles
y varies with x means y=kx
anonymous
  • anonymous
Ok
freckles
  • freckles
assuming it varies directly anyways
freckles
  • freckles
oh actually that is the form it gives in the last sentence
freckles
  • freckles
y=kx so anyways you need to find the constant of variation k constant means no matter what x and y is the constant will keep being the same number
freckles
  • freckles
so we can find k given (x,y)=(10,4)
freckles
  • freckles
replace x with 10 replace y with 4 and solve for the constant k
anonymous
  • anonymous
10/4
anonymous
  • anonymous
?
freckles
  • freckles
so you replace y with 4 and x with 10 in the equation y=kx so that g ives 4=k(10) try again...
freckles
  • freckles
k is being multiplied by 10
freckles
  • freckles
to get k by itself you need to divide both sides by 10
anonymous
  • anonymous
4/10=10k/10 ?
freckles
  • freckles
so k=?
anonymous
  • anonymous
.4
freckles
  • freckles
10/10=1 and 1k=k so you have 4/10=k right? and you can reduce 4/10 as 2/5 or I guess you can choose also to write it as .4 as you just did
freckles
  • freckles
so you had y=kx and you just found k to be .4 y=.4x
freckles
  • freckles
this is the equation you have and now you know k
anonymous
  • anonymous
Oh thank you soo much!!
freckles
  • freckles
now the last step is to solve for y when x is 25
anonymous
  • anonymous
ok one sec
freckles
  • freckles
y=.4x y=.4(25)
anonymous
  • anonymous
10
freckles
  • freckles
yes 4*25 is 100 since 4 quarters is a dollar and .4*25=10 great so when x is 25 y is 10
anonymous
  • anonymous
Thanks
freckles
  • freckles
np

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