What is 255 divided by 425

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.

A(t)=728(1+0.04)^t how much money did aditya originally invest

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827