The pentagon has five sides as shown in the figure. The perimeter can be expressed as 5 + 5 + 2x + x + 2x. Which expression is equivalent to the perimeter expression?

10 + 5x

Step-by-step explanation:

The perimeter is the length of all of the sides added together. In this case we are given a pentagon with numerical and non-numerical values but still the same principal applies in find the perimeter as you have to add all the sides together so

Perimeter = 5 + 5 + 2x + 2x + x

→ Simplify

Perimeter = 10 + 5x

So the perimeter of this pentagon is 10 + 5x

bn,mn,n.vn.

step-by-step explanation:

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.