5c+4p=18.40 2c+4p=11.20

c = 2.4

p = 1.6

Step-by-step explanation:

Given:

5c+4p=18.40

2c+4p=11.20

-1(2c+4p=11.20)    <-- Distribute -1 so that you can cancel out p

-2c-4p=-11.20

    5c+4p=18.40

+  -2c-4p=-11.20      <-- Add/simplify like terms

    3c = 7.2              <-- Isolate c by dividing    

c = 2.4

Now that we have c, we can find p

5c+4p=18.40

5(2.4)+4p=18.40   <-- Sub in 2.4 for c

12+4p=18.40        <-- Combine like terms in one side

4p=6.4                 <-- Isolate p by dividing

p = 1.6

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.

company a

step-by-step explanation:

using the linear regression models , it is found that company a   pays about $14 more. but using the same regression (linear) company b pays about $10 more.

so company a pays more than b