Question

z varies jointly with x and y. when x=2 and y=2 z=7.

what is z when x=4 and y=8. Please show work...

Answer 1

@myininaya @nincompoop

Answer 2

@dan815

Answer 3

@TheSmartOne @Luigi0210

Answer 4

@BloomLocke367

Answer 5

@confluxepic PLZZ

Answer 6

Let me think about it. @omarbirjas

Answer 7

*waits on Conflux*

Answer 8

The equation would be z=kxy.

Answer 9

K is the constant.

Answer 10

To turn the problem into an equation you have to add k.

Answer 11

Plug in the values.

Answer 12

so what would the constant be? any number i wish or what?

Answer 13

z=k4*8

Answer 14

You first solve for the constant.

Answer 15

ohhh so we use the previous values.

Answer 16

k=2*2*7

Answer 17

7=k(2)(2)

Answer 18

Find k and tell me.

Answer 19

k=28

Answer 20

Can you tell me how you got that?

Answer 21

7*2=14

Answer 22

14*2=28

Answer 23

\(\color{blue}{\text{Originally Posted by}}\) @confluxepic
7=k(2)(2)
\(\color{blue}{\text{End of Quote}}\)
This is the equation.

Answer 24

It would be k=7/4.

Answer 25

ohhhh yea i didnt do the deviding part, i just swapped out k and 7

Answer 26

ok now we can use z=(7/4)*(4)*(8)to find z right?

Answer 27

Now you have to find z when x=4 and y=8.

Answer 28

Yes.

Answer 29

z=56

Answer 30

god bless you and wolframalpha.com

Answer 31

btw cute cat......and baby at @Nnesha

Answer 32

Thanks. :)

Answer 33

Yes. z=56.