z is directly proportional to x and y. If when x=6 and y=8, then z=48, then what is z, when x=10 and y=12?
2 Answers
Jun 14, 2017
Explanation:
In other words
Since when
and hence
and when
Jun 14, 2017
Explanation:
"the initial statement is " zpropxy
"to convert to an equation multiply by k the constant of"
"variation"
rArrz=kxy
"to find k use the condition given for x, y and z"
x=6,y=8" when " z=48
z=kxyrArrk=z/(xy)=48/(6xx8)=1
rArr" equation is " color(red)(bar(ul(|color(white)(2/2)color(black)(z=xy)color(white)(2/2)|)))
"when " x=10" and " y=12
z=10xx12=120