Really need the answers

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.

Find the zeros of each function. f(x) = x^2 + 5x - 6

Mackenzie needs to determine whether the rectangles are proportional. which process could she use? check all that apply.