For the first one :)))))))
Answer:
The value of x is 1.
Step-by-step explanation:
You have to move all the x-terms to one side and the unrelated values to other side :


Next, you have to add up :

Lastly, you have to divide it by 11 :


Answer:
B 90
Step-by-step explanation:
By basic rules, all angles in a rectangle equal 90°
The simplified form of this polynomial is (n(20n + 1))/5
You would multiply 9x___ whatever the other number is witch is 4