Answer:
1/3 (A)
Step-by-step explanation:
We take 
and we combine them together. It leaves us with:
Now, we must solve for what we have by multiplying both the top and bottom of our fraction and that leaves us with:
And now, we simplify that into our answer: 
Try this option:
A. f(4)=7 - false; explanation: x=4, it means that x>0 and x²-1=4²-1=15 ⇒ f(4)=15.
B. f(1)=0 - true; explanation: x=1, it means that x>0 and x²-1=1-1=0.
C. f(-1)=2 - true; explanation: x=-1, it means that x<0 and -x+1=1+1=2.
D. f(-2)=0 - false; explanation: x=-2, it means that x<0 and -x+1=2+1=3 ⇒ f(-2)=3.
A circumcentre is the centre of the circumcircle.
The circumcircle of a triangle is the circle that passes through all three vertices.
Since all radii of a given circle are equal, we see that all the distances from H (circumcentre) to the vertices of the triangle are equal, namely
JH=KH=LH
Only one of the above answer choices is true.
You would divide them both my two to get 9/7
