joint and combined variation

[J. Mont-Rios]

directions:find an equation of joint variation. then solve for the missing value.




r varies directly as s and t. one set of values is r=28, s=7, t=8. find r when s=12 and t=9

 

[royhaas]

Solve for \(\displaystyle k\) in \(\displaystyle r=kst\).

 

[J. Mont-Rios]

thanx i apriciate iit