3x - 7 + 7 = 12 + 7
3x = 19
3x/3 = 19/3
X = 19/3 = 6 1/3
Answer:
7/10
Step-by-step explanation:
Given:
A triangle ABC.
The given expression for b is:
To find:
The expression that is equivalent to b.
Solution:
According to the Law of Cosines,
It can be written as:
...(i)
We have,
...(ii)
On comparing (i) and (ii), we get
Therefore, the required values are 
.
Answer:
The answer to your question is: x = 100
Step-by-step explanation:
It's a polygon of 7 sides
The sum of internal angles in a polygon equals 180(n-2), where n = # of sides
Internal angles = 180(7-2)
= 180(5)
= 900°
(x + 50) + (x + 50) + (x + 50) + x + x + x + (x + 50) = 900
4(x + 50) + 3x = 900
4x + 200 + 3x = 900
7x = 900 - 200
7x = 700
x = 700 / 7
x = 100
Answer:
It's the first one
Step-by-step explanation:
