Suppose that f(x) = ax + b, where a and b are real numbers. Given that f(f(f(x))) = 8x + 21, what is the value of a + b?

Apath 3 m wide runs around the inside of a square park inside 60 m.find the area of the path.pls

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 this equation using substitution. {4x + y = −2} {4x + 6y = 44}