Find the solution set of absolute equation |⅔x-⅑|<⅓

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

Use sigma notation to represent the following series for 9 terms.

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