Question

Plz solve question 12

Answer 1

Answer: C

Explanation:

To solve for 12, we can use eliminate or substituion to solve our system of equations. Let's use elimination method.

`\left \{ {{3f-2k=10} \atop {-3f-2k=14}} \right.`

Let's add the equations together. This way, 3f+(-3f)=0

`-4k=24` [divide both sides by -4]

`k=-6`

Now that we know k, we can plug it into either equation to find f.

`3f-2(-6)=10` [multiply]

`3f+12=10` [subtract both sides by 12]

`3f=-2` [divide both sides by 3]

`f=-(2)/(3)`

Now that we have f and k, we know that C is the correct answer.