A- 10.5
B- 5.25
is what the answers are
Answer:

Step-by-step explanation:

Distribute 4(x+2).

Subtract 2x and 8 from both sides.


Divide both sides of the equation by 2.


Answer: 128
Step-by-step explanation:



Answer:
The polygon has 3 sides ( a triangle).

Explanation:
The sum of the angles of a polygon can be written as;

where n is the number of sides of the polygon.
Given that the sum of the angles in the polygon is 180 degree;

Therefore, the polygon has 3 sides ( a triangle).
C is undefined because you cannot divide by 0.
D is - 2/3 divided by -5/4 --> -2/3 * -4/5 = 8/15