Put these in descending order 0.68,0.9,0.81 and 0.86

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?

If a || b and e || f , what if the value of y ?

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