What is the value of X

If f(x)=2x^6+x^2+2 then what is the remainder when f(x)is divided by x+2

Aplane flies around trip to philadelphia it flies to philadelphia at 220 miles per hour and back home with a tailwind at 280 miles per hour if the total trip takes 6.5 hours how many miles does the plane fly round trip

How do you use the elimination method for this question? explain, because i really want to understand!