If give 7 billions for 7 millions people. What is total?

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

Which of the following shows the length of the third side, in inches, of the triangle below

What is the solution to this system of equations? y= 2x - 3.5 x - 2y = -14