Answer:
Step-by-step explanation:
2(x+0.6) + 5(1.02-x) = 0
Opening the brackets
2x + 1.2 + 5.1 - 5x = 0
-3x + 6.3 = 0
-3x = -6.3
x = -6.3/-3
x = 2.1
7 3/4 + 2 3/4 you can add
7 + 2 = 9.
3/4 + 3/4 = 6/4. That can simplify into 1 2/4 = 1 1/2.
The answer is 10 1/2.
You're welcome :)
The formula for interior angle sum is 180(n - 2).
Backtrack it from that.
180(n - 2) = 1980.
1980 / 180 = 11 = n - 2.
11 + 2 = 13 = n.
The polygon has 13 sides.