Please help me thank you kind person!:)

You are designing a rectangular pet pen for your new baby puppy. you have 30 feet of fencing you would like the fencing to be 6 1/3 feet longer than the width

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4

Factor the polynomial, if possible. if the polynomial cannot be factored, write prime. 9n^3 + 27n^2 – 25n – 75