Anyone help me on this plz :((

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

In the diagram, the ratio of ab to ae is (1/2) . what is the ratio of the length of to the length of ?

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