-x^2+13=
−x
2
+13=
\,\,3x
3x

The number of revolutions of two pulleys is inversely proportional to their diameters. if a 24-inch diameter pulley making 400 revolutions per minute is belted to an 8-inch diameter pulley, find the number of revolutions per minute of the smaller pulley.

What is the value of x in the diagram below?

Find the value of x. give reasons to justify your solutions! l, m ∈ kn