Plz ! need this fast! plz show your work! thx so much!

Pat listed all the numbers that have 15 as a multiple write the numbers in pats list

What is the missing statement in step 4? ? rts ? ? vtu and ? rtu ? ? vts ? rts ? ? rvs and ? rtu ? ? stv ? vrs ? ? vru and ? usr ? ? usv ? vur ? ? vus and ? uvs ? ? sru

Consider the sequence below. 3 , 1 , 1/3 , 1/9 , select the explicit function which defines the sequence.