To answer the question, simplify the polynomial by adding those that has the same degree of variable, 6 - 3x + (6x³ - 2x³) 6 - 3x + 4x³ Rearrange the polynomial with decreasing exponent or x, 4x³ - 3x + 6 This is a third-degree polynomial.
Let the speed off the walk way be x and speed of the walkway be y x+y=6....i x-y=2....ii adding the above equation we get: 2x=8 thus x=4 ft/s and y=6-4=2 ft/s thus the speed off the walk way is 4 ft/s the speed of the moving walkway is 2 ft/s
