Two speed signs are 55mph and 50 km/h. Which sign allows for a faster speed

What is the length of the missing leg in this right triangle? 18 mm 24 mm 26 mm 32 mm

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

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