Practice problem
Let yyy vary inversely with xxx and directly with the square of zzz. If y=1y=1y=1 when x=15x=15x=15 and z=3z=3z=3, what is yyy when x=20x=20x=20 and z=4z=4z=4?
43\frac{4}{3}34
6427\frac{64}{27}2764
111
34\frac{3}{4}43
Type a concept, like “slope” or “photosynthesis”.
