Choose the expression that represents a quadratic expression. 6x^4 − 5x^3 + 3x^2 −7x − 8
5x^3 + 3x^2 −7x − 8
2x^2 + 3x − 1
3x − 1

Rick is driving to his uncles house in greenville,which is 120 miles from ricks town .after covering x miles rick she's a sign stating that greensville is 20 miles away. which equation when solved will give the value of x. a: x+120 = 20 b: x x120 =20 c: x +20 equals 120 d: x x20= 120