Which tiles should be added to the model below to make zero? - - - - - -
O 6 negative tiles
O 6 positive tiles
O 3 negative tiles and 3 positive tiles
O 6 negative tiles and 6 positive tiles

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 number 321,000,000 in scientific notation? also what is the number? ?

Polygon abcde is reflected to produce polygon a′b′c′d′e′. what is the equation for the line of reflection?