Find the sum and choose the correct answer 2n^3 + 4n^2 -7 and -n^3 - 8n - 2

Samantha swam upstream for some distance in one hour. she then swam downstream the same river for the same distance in only 12 minutes. if the river flows at 4 mph, how fast can samantha swim in still water?

Find the zeros of the function. write the smaller solution first, and the larger solution second f(x)= (x+6)^2-49

Answer this question only if you know the answer! 30 points and