4p+2p what is the answer

What two criteria are needed for triangles to be similar

In the triangles, bc =de and ac fe. if the mzc is greater than the mze, then ab isdfelth

Me! i really need to get this right before 9. prove the divisibility of 7^6+7^5-7^4 by 11. use factoring so you get a number times 11. just tell me the number. i need this done asap