Question 1128283
Write an equation describing the relationship of the given variables.
y varies jointly as x and the square root of z and when x = 8 and z = 49,then y = 840.
y = kx*{{{sqrt(z)}}} 
8k*{{{sqrt(49)}}} = 840
8k * 7 = 840
56k = 840
k = 840/56
k = 15
the equation
{{{y = 15x*sqrt(z)}}}