N/6=15/18 and 2(n+1)=3(n-1) are equavalent equations?

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.

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

The measure of an angle is 117°. what is the measure of a supplementary angle?