100,203 in expanded form

Regular price is $77.00 and the discount is 5% find the sale price

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?

[15 points, algebra 2]simplify the complex fraction and find the restrictions.