Use the function r=a+5 to find the value of r when a=10

Question part points submissions used suppose that 100 lottery tickets are given out in sequence to the first 100 guests to arrive at a party. of these 100 tickets, only 12 are winning tickets. the generalized pigeonhole principle guarantees that there must be a streak of at least l losing tickets in a row. find l.

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

State if the two triangles are congruent. if they are, state how you know?