Combine like terms. what is a simpler form of the expression
-3(-4y+3)+7y

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.

25 ! the line of best fit is h = 5a + 86. predict the height at age 16.

How to do this , and can some one explain