Question

x varies inversely as y^2, and x=4 when y=10. find x when y=2

Answer 1

Since Inversely proportionals is given:

\[x = \frac{k}{y^2}\]

Where k is any constant..

Now you have given x = 4 and y = 10

Plug in the values and find k first..

Answer 2

so like this
4 = k/2^2

Answer 3

Yes but at first y is given 10..

So use y = 10..

Answer 4

so 400

Answer 5

Yes you are right..

Now you got k = 400 (remember this value)..

Now, we have to find x but y is given as 2..

Can you find x ??

k = 400 and y = 2

Answer 6

100

Answer 7

Yes absolutely right...

Good Job..

Answer 8

thank you

Answer 9

Welcome dear..

Answer 10

i just did help setting it up

Answer 11

I have one more like that I am gonna try it can you tell me if I am right

Answer 12

See the difference here if the question says x varies directly as y squared then the equation would be:

\[x = ky^2\]

In short:

Inversely means in denominator.

Directly means in numerator..

And note that the constant k will always be in Numerator..

Answer 13

okay thanks again

Answer 14

Take your time try it once and I will check if it is right or not..

Answer 15

x varies inversely as v, and x = 48 when v = 8. Find x when v = 64
so I got x = 6

Answer 16

What you got for k ??

Answer 17

384

Answer 18

Yes dear..

Answer 19

384/64 = 6

Answer 20

thanks again

Answer 21

Now do you understand how to solve them??

Answer 22

yes I do

Answer 23

So, Best Of Luck..

Generally I do not give medals easily but this one for you for doing the Second Problem firstly on your own and secondly absolutely right...

Ha ha ha ha..

Answer 24

thanks

Answer 25

Welcome dear..

Answer 26

it has just been a long time for me I have been out of school for over 25 years and I am trying to get my high school diploma by myself online

Answer 27

Your age???

Answer 28

41

Answer 29

i quit school when I was 16

Answer 30

never had freshman credits

Answer 31

O My God,
can you imagine I am exactly 20 years younger than you..
I am just 21 now..

Doesn't matter..
Forget the past, Live in Present and Think about making the Future wonderful..

Best of Luck dear..

I pray, you will have your diploma at the earliest...

Answer 32

thank you so much I raised my kids they are all in college now it is time for myself

Answer 33

Yes Best of Luck for today tomorrow and for future...