Even numbers between 1 and 9

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.

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)