Which is the value of this expression when a=-2 and b=-3

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.

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1

Alex measured the length of an item to be 3.7 cm. the actual length is 3.5 cm. what is alex’s percent error?