-2(x+4)=12
please explain what to do .

x = -10

Step-by-step explanation:

First I would expand by distributing the left side.

Using distribution the new equation would be: -2x - 8 = 12

Now, I would move constants to one side and keep variables on the other side.

Doing this, my new equation would be -2x = 20

Now I would divide both sides by negative 2, giving the answer x = -10

1/2*qr*rs

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.