Kenny bought gifts for all 18 members of the math club. he bought t shirts for $9 and sweatshirts for $15. if he
spent $180, how many t-shirts and how many sweatshirts did he buy?

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.

You paint a 1/2 of a wall in 1/4 hour. how long will it take you to paint one wall

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b