43/5 s a decimal or a mixed fraction

Which is the focus of a parabola with equation y2=4x

An ant travels at a constant rate of 30cm every 2 minutes. at what speed does the ant travel per minute

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