Answer:
The answer is x = -6
Step-by-step explanation:
What do you need help with?
Answer: 
Step-by-step explanation:
By definition, the sum of the exterior angles of a polygon is 360 degrees.
Knowing this, you can write the following equation:

Then, you must solve for "x" in order to find its value. To do it, you can follow these steps:
1. You need to add the like terms:

2. Now, subtract 40 from both sides of the equation:

3. Finally, you must divide both sides of the equation by 4. Then:

Answer: The ladder will be unsafe because its angle with the ground is greater than 70°.
Step-by-step explanation: hope that helps