In the tens place has 10 times the value of a 7 in the place

Which of the following is correct interpretation of the expression -4+13

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

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