Answer:
frequency
Step-by-step explanation:
Planck showed that the energy that is emitted or absorbed by an object is proportional to the _<u> </u><u>frequency</u><u>__</u>__ of the radiation.
Let blank =x
4+x=3+4
4+x=7
-4 -4
x= 7-4
x=3
blank is 3
Known :
Ratio = Greg : Harry = 1 : 3
Greg's money = £8
Asked :
Harry's money = ...?
Answer :

So, Harry gets £24
<em>Hope </em><em>it </em><em>helpful </em><em>and </em><em>useful </em><em>:</em><em>)</em>
Here we are given the x intercepts at x=3 and x=9
So let us try to make quadratic equation for this using given information.
We have factors in the form (x-a)(x-b)
where a and b are x intercepts given to us.
So rewriting in factored form:

Now let us simplify it:

Let us find the vertex now,
For a quadratic equation of the form:

For x coordinate , we have the formula,

So using this formula for our equation,

So x = 6
Answer: The x-coordinate of the parabola's vertex is 6.