A plumber needs to replace 20 feet of copper piping. When he gets to the supply store, the lengths are given in meters. How many
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Ok so in order to find the answer to this problem we are going to Multiply 
and 
.
We have the following function that is a quadratic function:
So the graph of this function is shown in the figure below. This is a <em>parabola</em> as you can see. The roots of this functions, that is, the x-intercepts are:
As you can see in the figure. This function decreases from
and increases from 
Finally, another thing we can see from the graph is that the vertex is the point:
So the graph of this function is shown in the figure below. This is a <em>parabola</em> as you can see. The roots of this functions, that is, the x-intercepts are:
As you can see in the figure. This function decreases from
Finally, another thing we can see from the graph is that the vertex is the point: