Yvaries inversely with x k=2.8 what is the value of x when y is 22.4

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.

Write the pair of fractions as a pair of fractions with a common denominator

The difference between two numbers is one. three times the larger number minus two times the smaller number is 9. what are the two numbers