Ax+by=c, how would I solve for y

Solving for y means trying to get the equation into the form y= _____.  So, let's say that we are going to keep the y value on the left side of the equation.  

First, we would subtract ax from both sides.  This results in the equation by=c-ax.

Next, we figure out that y has a coefficient of b.  They are combined together by multiplication, so to undo this operation, we need to divide both sides by b.  

If done correctly, your final answer should be.  Or, y=c-ax/b

28.26

Step-by-step explanation:

The head of a nail would be considered a circle, therefore you would want to use the formula for area of a circle: a=×π but in this circumstance using π as 3.14.

Because we are given diameter we need to DIVIDE by 2 to get your radius. 6/2=3. Your radius is therefore 3 and can be plugged in to you equation as a=×3.14. Now simplify and you'll get a=9×3.14, now solve and you'll get a=28.26.