Find three numbers such that their sum is 12, the sum of the first, twice the second, and three times the third is 31, and the sum of the third and nine times the second is 1

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?

Which is the solution to the inequality? 2 3/52 1/15 b< 3 2/15 b> 3 2/15

What is the interquartile range of this data set? 2, 5, 9, 11, 18, 30, 42, 48, 55, 73, 81