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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

In the diagram below,abc is congruent to dec what is the value of x

If a=0.333333 and b=0.55555, what is the value of a+b