What are the coordinates of the midpoint of cd¯¯¯¯¯ where c(2, −6) and d(4, 10)? (3, 2) (3, −8) (−1, 2) (2, 3)

Problem number 26 of the rhind papyrus says: find a quantity such that when it is added to of itself the result is a 15. the modern day equation that models this problem is x + x = 15. what is the solution to the equation? x = 10 x = 12 x = 15 x = 30