Question 1059054
I am lost can you help me with this problem?

Z varies directly as x and inversely as y. If z=123 when x=6 and y=6, find z if x=7 and y=8.
<pre>{{{Z = kx/y}}}
{{{123 = k(6)/6}}} ------- Substituting 123 for Z (not z), 6 for x, and 6 for y
123 = k

{{{Z = kx/y}}}
{{{Z = 123(7)/8}}} ------- Substituting 123 for k, 7 for x, and 8 for y
{{{highlight_green(matrix(1,7, Z, "=", 861/8, or, 107&5/8, or, 107.625))}}}