Why cant i message and im an expert

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?

3382-299=3383- ? fill in the blank?

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36