(4s^2 + 2st + t) + (-3s^2 + 5st - 4t)
what is the sum of the polynomial?

Okay so since you're just adding these two polynomials together and there's no special operations going on, you can just ditch the parenthesis and start simplifying.
4s² + 2st + t - 3s² + 5st - 4t
4s² - 3s² + 2st + 5st + t - 4t
s² + 7st - 3t
that should be your answer

Y=3x+1 so the first one

Ithink ghe answer to this question is b just trying to others