Problema Solution
Find an expression of variation in which Y varies jointly as x and z, and y=18, when x=6 and z=3
The equation of variation is y=
Answer provided by our tutors
y=x+4z
coz y=18
x=6
z=3
so to become x+z=18 =>6+z=18=>z=12
we know z=3 so to become 12 we need 4 z
then the eqaton is
y=x+4z