Question

Help? Suppose that r varies directly with s and inversely with t, and r = 2 when s = 3 and t = 12. What is the value of r when s = 5 and t = 4

Answer 1

And it's multiple choice.
A. 2/5
B.32/5
C.10
D.20

Answer 2

wait hold on for 10 minutes and ill figure it out by going into a different tutor site :D

Answer 3

Mind giving me a link? You know for next time if I can't get help here.

Answer 4

it only works in alabama so..................... the state of alabama provides it to the state only so........

Answer 5

Oh -.- I should probably check if Georgia does anything like that..

Answer 6

good idea!!!:D

Answer 7

Did you find anything?

Answer 8

On your Alabama tutoring site..

Answer 9

they are helping right now

Answer 10

okey got it

Answer 11

:D

Answer 12

Yay! Lol. What is it?

Answer 13

r varies directly with s and inversely with t means r->s/t

Answer 14

then i would look for K

Answer 15

by isolating k from the rest

Answer 16

okey lets restart (the answer is c by the way ) first isolate k. Then plug in the what you know. so k=rxt/s equal tp k=2x12/3.

Answer 17

k=8

Answer 18

then get r=kxs/t (the original equation ) and plug in what you know

Answer 19

How did you get k=8?

Answer 20

so the question is asking "r varies directly with s and inversely with t" which is r=kxs/t
whic you have to isolate k by multiplying by t/s to both sides

Answer 21

k=r x 4/5

Answer 22

12/3 because we are first using the example

Answer 23

k=r x 12/3

Answer 24

Oh okay, then what?