Hi I have a test coming up on Friday and I am wondering if can help me with me please ​

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.

Graph the system: f(x)= 3/x-2; f(x)= 1/2x + 2

Which of the following is true for the relation f(x)=2x^2+1