Evaluate the expression simplify if possible 5 2/5 - 6 5/7

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Enter the number of complex zeros for the polynomial function f(x) = x 4+ 5x² +6

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