SOLUTION: if xyz=4 and y^2z=5, what is the value of x/y?

Algebra ->  Test -> SOLUTION: if xyz=4 and y^2z=5, what is the value of x/y?      Log On


   

Question 348141: if xyz=4 and y^2z=5, what is the value of x/y?
Found 2 solutions by london maths tutor, ewatrrr:
Answer by london maths tutor(243) About Me  (Show Source):
You can put this solution on YOUR website!

xyz = 4
y^2z = y*y*z = 5
%28xyz%29%2F%28y%2Ay%2Az%29
=x%2Fy
=4/5
Hope this is useful.
Visit http://www.london-maths-tutor.co.uk/ for more maths help.

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
Hi,
*Note: solve x and y in terms of z
.
y%5E2z=5
y+=root%282%2C%285%2Fz%29%29
.
xyz=4
x = 4/yz
.
x+=+4%2F%28root%282%2C%285%2Fz%29%29%2Az%29
.
Substitute and simplify
x/y