PLEASE HELP, QUESTIONS 4 AND 5 ARE RELATED TO 2 AND 3

Which polynomial function has x intercepts -1, 0, and 2 and passes through the point (1, -6)

Which graph represents the solution set for the given system of inequalities? x+2y< 3 x+y> 4 3x-2y> 4

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.