Answer:

Step-by-step explanation:
Required
The equation of the ellipse
This is calculated as:

Where:
---- height
--- width
So:



The answer is A) 3.
I hope this helps.
Answer:
PQ:80
QR:160
PR:120
Step-by-step explanation:
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×
=
×
∠
×

×
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=
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<em>hope it helps </em>
<em>have a great day!!</em>
Answer:
B 
Step-by-step explanation:
In order to get the same denominator, we need to multiply the second fraction by (b+2) in the numerator and denominator.
We will end up in something like this :
I just timed the second fraction by b+ 2 and then i added them together.
Therefore, we will get 
now factoring the numerator we will end like this

we will then end up with the answer.
Hope this helps.