Z varies directly with the and indirectly with the and a. If Z=360, r=5, t=3 and s =12

Question

Need to find the constant of proportionality. Cannot find this in my book. Need to know how to solve guess kinds of problems, like formulas to use.

Answer 1

indirectly means the same as inversely.

Because of typos in the question it’s not possible to tell which of the following is intended:

z=kr/(st), z=ks/(rt), z=kt/(rs)

so three answers will be given for the constant k.

360=kr/(st), 360=5k/36, k=36×72=2592;

360=ks/(rt), 360=12k/15, k=15×30=450;

360=kt/(rs), 360=3k/60, k=60×120=7200.