Pls help me with this math.

1)The sum of a number and 16 is equal to 45?

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.

Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.

X-10/4 when x = –18 a 7 b –2 c –7 d 2