Simplify the expression below.                                                                                           . 2x^3 - 12x^2 + 18x - 108 / x - 6a) 4x^2 + 9xb) 2x^2 + 18 c. 3x + 5d) 3x + 2

Can i get some on 18,20,& 22? or one of them

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?

Cody started biking to the park traveling 15 mph, after some time the bike got a flat so cody walked the rest of the way, traveling 4 mph. if the total trip to the park took 6 hours and it was 46 miles away, how long did cody travel at each speed? solve using rate times time= distance