Really need !

simplify: 6m^2n^2-3mn+4mn+13m^2n^2+9

possible answers:

19m^2n^2+mn+9

20m^2n^2+9

Solve the equation w^3 = 1,000 i honestly dont know how to punch this into a calculator pls

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.  

Solve this problem! extra ! 3025/5.5 = a/90.75 / = fraction