Answer:
The value of x is 25 degrees.
Explanation:
To find the value of x in the expression "115° + 40° + x°," you need to add the given angles together and set the sum equal to 180°, because the sum of the angles in a triangle is always 180°. So, you can write the equation as follows:
115° + 40° + x° = 180°
Now, let's solve for x:
155° + x° = 180°
To isolate x, subtract 155° from both sides of the equation:
x° = 180° - 155°
x° = 25°
So, the value of x is 25 degrees.