Answer:
1. x = 40°
2. 4x - 25 = 135°
3. x + 5 = 45°
Step-by-step explanation:
1.
According to the figure and since m//n then
The two angles of measures (respectively) 4x - 25 and x + 5 are supplementary .
Then
4x - 25 + (x + 5) = 180°
Then
5x - 20 = 180
Then
5x = 200
Then
x = 200/5
Then
x = 40°
……………………
2.
x = 40
Then
4x - 25 = 4(40) - 25 = 160 - 25 = 135°
…………………………………………………………
3.
x = 40
Then
x + 5 = 40 + 5 = 45°
