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.
Answer:
There is no additive inverse only a multiplication because 1/2 is division so you have to do multiplication. But the answer to that is 2.
Answer:
uhhh... why dont you check my work lol
Step-by-step explanation:
y = -15/18x + b
-1 = -15/18 (6) + b
-1 = 5 + b
-6 = b
check your work:
14 = -15/18(-12) - 6
14 = 10 - 6
14 = 4
Where is the Graph of the equation?
<span>3x2 + x + 10 = 0, delta = 1² - 4.3.10= - 119 <0 so the answer is
b) </span><span>No real solutions</span>