Question

If p varies directly with q, and p = 10 when q = 2, what is the value of p when q = 20?



A.


p = 28


B.


p = 100


C.


p = 1


D.


p = 40

Answer 1

what 's the equation for direct variation ??

Answer 2

i dont remember and i suck at it

Answer 3

direct variation y = kx
y varies directly with x :-)

Answer 4

Well it is just a ratio

Answer 5

okay yeah i remember that now

Answer 6

alright so p varies directly with q
write an equation

Answer 7

Don't you just multiply p•5?

Answer 8

100?

Answer 9

nope what's the equation p varies directly with q ?

Answer 10

y varies directly with q
y = kx
now replace y by p and x by q

Answer 11

whaaaaaa

Answer 12

\[10=k2\] ?

Answer 13

?

Answer 14

sorry intnt gt disconnected

Answer 15

that's right solve for k

Answer 16

k=5?

Answer 17

right
\[\huge\rm p=2q\]
substitute q value solve for p

Answer 18

okay so what would it be when its 20?

Answer 19

yes right

Answer 20

?

Answer 21

ohh sorry i thought u said q would be 20 .-.

Answer 22

so replace q by 20 solve for p

Answer 23

\(\color{blue}{\text{Originally Posted by}}\) @Nnesha
right
\[\huge\rm p=2q\]
substitute q value solve for p
\(\color{blue}{\text{End of Quote}}\)
q=20 plug in

Answer 24

40!

Answer 25

@Nnesha ?

Answer 26

yes

Answer 27

thanks:)