Simplify 5√3 + 2√27 plzzz​

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

Hi, can anyone show me how to do this problem? 100 points for this. in advance

A.s.a.! similarity in right triangles, refer to the figure to complete this proportionc/a = a/? a.) cb.) hc.) rd.) s