College Algebra Word Problem

Question

z varies directly as x and inversely as y. If z=226 when x=3 and y=8, find z if x=7 and y=9. (Round off your answer to the nearest hundredth.)

Answer 1

z = kx/y

now substitute those givens, and solve for k.

then plugin the x=7, y=9 to solve for requested z.