Answer:
6x^3+11x^2-14x+12
Step-by-step explanation:
We just simply add like terms (terms with same power of x):

Like terms are in brackets now
So you just simplify now to give you:

11.00*9.5=104.5
104.5*0.07=7.315
7.315+104.5=111.815
Answer:
45 points
Step-by-step explanation:
You could do it with proportions. Start with 18/x=40/100. then, cross multiply and you should get x=45.