Question

y varies inversely as twice x. When x = 2, y = 5. Find y when x = 10.
Please helppp me

Answer 1

y=k/2x

Answer 2

Now try

Answer 3

y=k/(2x)
not just plug in x=2 and y=5 to find the constant k

Answer 4

y = 1

y = 20

y = 8

y = 10
these are the possible answers

Answer 5

now*

Answer 6

idkk

Answer 7

what do you for k when pluggin in x=2 and y=5

Answer 8

5/4

Answer 9

you see we have y=k/(2x)
just put a 5 where that y is
and
just put a 2 where that x is

Answer 10

so you would have
5=k/(2*2) right?
now solve for k

Answer 11

5=k/4?

Answer 12

ok solve for k

Answer 13

20?

Answer 14

right k=20 gj
so we have y=20/(2x)
or you can reduce this fraction
y=10/x

Answer 15

we want to find y when x=10

Answer 16

so if x=10
then y=?

Answer 17

so what do i do?

Answer 18

plug in 10 where u see x

Answer 19

so y=1?

Answer 20

yes because 10/10=1

Answer 21

k thank you so much