Please help!! i need 9, 10, 11, 12.

Which equation represents h for right triangle abc

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

What number gives you a irrational number when added to 2/5