Answer:
6
Step-by-step explanation:
You have to add like terms. So the 5n and -5n would cancel each other out (because 5-5=0) and 9-3=6.
I’m pretty sure it is 57?
There are parrelell line and congruent line in the part to get the answer u must figure ot the angles in each one.6 to 2=12 that the answer for number 1.i might dont have it right.people say im dum.at least i try.
Algebraic, because it is a list decimals rounded by tens.
