What is the sum of the polynomials? 1.3t3 + t2 - 42t + 8 1.3t3 + t2 - 6t + 8 1.9t3 + 8.4t2 - 42t 1.9t2 - 42t + 8

(1) 1.3t^3 + t^2 - 42t + 8

(2) 1.3t^3 + t^2 - 6t + 8

(3) 1.9 t^3. + 8.4^t^2 - 42t

(4) 1.9t^2 - 42t + 8

I hope I got that right!

okay, now they are all separated in columns, add the ones with the same powers (e. g (1) _ 1.3t^3 + (2) 1.3t^3 + (3) 1.9 t^3 = 4.5t^3.

1.3t3 + t2 - 42t + 8