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- anonymous

Question down below, will award a medal.

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- anonymous

##### 1 Attachment

- anonymous

@Nnesha

- anonymous

I had gotten 4=10*25

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## More answers

- anonymous

How would I find y if x=25?

- anonymous

How do I solve this problem? @freckles

- anonymous

I'm not really understanding.

- freckles

y varies with x
means
y=kx

- anonymous

Ok

- freckles

assuming it varies directly anyways

- freckles

oh actually that is the form it gives in the last sentence

- 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

so we can find k given (x,y)=(10,4)

- freckles

replace x with 10
replace y with 4
and solve for the constant k

- anonymous

10/4

- anonymous

?

- 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

k is being multiplied by 10

- freckles

to get k by itself you need to divide both sides by 10

- anonymous

4/10=10k/10 ?

- freckles

so k=?

- anonymous

.4

- 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

so you had y=kx
and you just found k to be .4
y=.4x

- freckles

this is the equation you have and now you know k

- anonymous

Oh thank you soo much!!

- freckles

now the last step is to solve for y when x is 25

- anonymous

ok one sec

- freckles

y=.4x
y=.4(25)

- anonymous

10

- 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

Thanks

- freckles

np

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