Answer:
#15- x=80
Step-by-step explanation:
First, we need to know what is the sum of all the angles of a pentagon. For this, we use the formula (n-2) (180) where n is equal to the number of sides the shape has.
In this case, a pentagon has 5 sides.
The formula will read as follows:
(5-2) (180)
(3) (180)
540
Now with this information, you can equal all the interior angles to be 540
(x+35) + (x+46) + (x-9) + (2x+6) + (x-18) = 540
with this, we now combine like terms
6x+ 60 = 540
Now we solve
6x=480
x=80
