Solve for x
2x - 5 = x + 5

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.

Is a positive integer raised to a negative power always positive

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180