18 x - 54 xy + 36y please help me send the answer As soon as possible

Ashopper bought a watermelon a pack of napkins and some paper plates in his state there was no tax on food the tax rate on non-food items is 5% the total for the three items he bought was 825 before tags and he paid $0.19 in taxes how much did the watermelon cost

Gretchen is setting up for a banquet. she has 300 chairs and needs to distribute them evenly among t tables. how many chairs should she put at each table? write your answer as an expression.

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)