I have a lot of work to do and i need you guys, who will like to help me​

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.

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.