Im not sure but i think the answer is about 266.6
Answer:
Step-by-step explanation:
To start calculating, we first need to make some proof.
Firstly, since AB = AC, we know that ΔABC is isosceles, which means that ∠ABC = ∠ACB.
Now, looking only to ΔBDE and ΔCDF, we can see that they are similar, because the two of its angles are congruent:
∠BED=∠CFD
∠DBE=∠DCF
To make it easier to visualize which are the corresponding vertexes, we can draw them like this:
And we need to remember that BC is 24, so:
BD+CD=24
Since the triangles are similar, their corresponding sides have constant ratio, which we can calculate from the corresponding sides DE and CF:

This ratio is the same for the other corresponding sides, so we can apply that for BD and CD:

Thus, the measure of CF is approximately 13, alternative D.
<h3><u>Solution</u>:-</h3>
The equation of any straight line can be written as in slope intercept form as -

where,
- m is its slope
- c is its y-intercept.
<em><u>Given equation:- </u></em>

<u>Arranging it in slope intercept form by transposing 5x to RHS </u>


Comparing the equation y = -5x +10 with the standard form of the equation, we get -


Thus , 5 is our required answer.