Idon't understand this!
-growls- btw it's #28 and i tried to fit in the first 2 columns on the graph because you need those for the question.

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

What is the solution set of the quadratic inequality x^2-5< or equal to 0

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