Given the function: f ( x ) = { 9 x + 6 x < 0 9 x + 12 x ≥ 0 Calculate the following values: f ( − 1 ) = __ f ( 0 ) =__ f ( 2 ) = __ show me steps

Given: x + y = 6. if xe (-15, -6, -1), then which of the following sets of ordered pairs are solutions? © {(-15, -21), (-6, -12), (-1, -7)} [(-15, 21), (-6, , 7)} {(-15, 21), (-6, 12), (-1, -7)}

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?