Answer:
Option A 
Step-by-step explanation:
we know that
To divide complex numbers, you must multiply by the conjugate.
we have

To find the conjugate, change the sign between the two terms in the denominator
so

Answer:
Acceleration and velocity are two different things. The acceleration is the rate at which the velocity is increasing. So while the velocity very well may be increasing, the rate (acceleration) at which it is, is decreasing.
To solve this problem you must apply the proccedure shown below:
1. You have that the <span>data set has SSR=400 and SSE=100
2. Therefore you have </span><span>the coefficient of determination is:
r</span>²=SSR/SSTO
SSTO=SSR+SSE
3. Then, when you substitute the values, you obtain:
SSTO=400+100
SSTO=500
r²=400/500
4. So, you have that the result is:
r²=0.8
Therefore, as you can see, the answer for the exercise shown above is: <span> the coefficient of determination is 0.8</span>
Let’s count it.
I’m assuming that you have a regular deck of cards and that means 13 hearts and 13 kings.
You can pick any card of 52 with equal probability 1/52 for each.
So there are 52 opportunities of 1/52 probability to take any card from deck.
But you are looking only for 13 of hearts and for 13 of kings. That means your chance is (13 + 13) / 52 = 1/2 :)