LaTeX: 7^2+4\left(2^2+3\right)\div2

Which value of c would make he following expression completely factored? 8x+cy

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.

Write two subtraction equations that are equivalent to 5 + 12 = 17.