What is the solution to the system of equations using the linear combination method?

We are given two equations as shown above. Call them A and B.

A: 5x + y = 2

B: 4x + y = 5

Both A and B have a y term. If you add the y terms you get 2y, which doesn't help. What does help is to subtract. Another name for the Linear Combination method is the Elimination Method - with the goal to Eliminate one of the variables.

5x + y = 2

4x + y = 5

Now we multiply equation B by -1 so that we can subtract.

5x + y = 2

-4x - y = -5

We add the two new equations together.

1x = -3

So x = -3. Now we take x = -3 and put it back into an original equation. Choose B.

4x + y = 5

4(-3) + y = 5 putting in x = -3

-12 + y = 5 multiplying the -3

y = 17 adding 12 to both sides

Our solution is x = -3, y = 17, or the ordered pair (-3, 17).

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.