<span>5 + 2i–4i + 15i12
2+ square root of 6</span>
If your looking for a simplified answer, it would be

.
Hope this helps.
I forget sorry I’m very sorry I don’t even know elegy I commented
Use the pythagoream theorem A^2+B^2 then square your answer a being your adjacent side and b being your opposite leg.
we know that
<u>The correlation coefficient</u> is a number between
and
that represent the linear dependence of two variables or sets of data
Using the function CORREL in a excel tool, calculate the correlation coefficient (r)
see the attached table
the correlation coefficient for the data in the table is equal to 
therefore
<u>the answer is</u>
