5. What is the surface area of this triangular pyramid? 5 cm
3 cm
5 cm
5 cm
4.3 cm

step-by-step explanation:

ask goog great chance of finding the solution there

answer is x<

i believe the correct answer is option 4.principalities were small territories that were run by russian rulers.

which statement correctly defines principalities in northern asia in the 1200s? principalities were small territories that were run by russian rulers.

hope i could ! : )

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!