You can get the vertex form by completing the square.
this is currently in standard form (ax2 + bx + c)
In f(x) = x2-4x+9, b = -4
We need to get (b/2)2 to complete the square.
b = -4
(b/2)2 = (-4/2)2 = (-2)2 = 4
Now we take this number and add it to both...

To simplify this problem, let's try to solve for Y so we can just input values for X.
14y + 4x = -14
14y = -14 - 4x Move 4x to the other side of the equation
14y = -14 - 4x ...

This question can be solved by thinking of it as a ratio.
If 1 packet = 3/16 ounce of ketchup, and we need to figure out how many packets we can make with 24 ounces, then we can say X is the number of packets.
we can create a fraction:
1 packet = ...