What is the difference when 2x^3+x-5 is subtracted from 6x^3-x^2+4x+8?

If 20% of a number is 35, what is 50% of that number?

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1

Ill mark the brainliest if you me with the these three questions 7,8,9