The given expression is

THe given expression is a rational expression, and rational expression should not have 0 in the denominator.
Moreover, the denominator is a square root term, and square root don't have a value for negative number .
Therefore 2x+10 must be greater then 0. That is

Therefore the required domain in set builder form is
{
}
Answer:
x=4
Step-by-step explanation:
1. Divide both sides of the equation by 2
x+5=9
2. Move the constant to the right -hand side and change its sign
x=9-5
3. Subtract the numbers
x=4
Answer: 20 feet.
Step-by-step explanation:
Observe the right triangle attached.
You need to find the value of "x".
Then, you can use the Pythagorean Theorem:

Where "a" is the hypotenuse of the triangle, and "b" and "c" are the legs.
In this case, you can identify that:

Substitute these values into
:

Now, you need to solve for x to find how far up the wall the top of the ladder reaches. Then you get:


