Answer:
The answer is 2
Step-by-step explanation:
x+y = (1+i) + (1-i)
open the bracket...
1+i + 1-i
collect like terms
=1+1+i-i
= 2-0
=2
Answer:
Step-by-step explanation:
When talking about reflection, we usually mean reflecting across a line, or axis. Reflecting a shape means looking at the mirror image on the other side of the axis. Consider the point (x,y), if you reflect this point across the y-axis you should multiply the x-coordinate by -1, so you get:

For triangle ABC we have:

Therefore, the reflecting points are:

Both the original triangle and the reflected one are shown below.
1 and 2 are natural numbers
-7 belongs to set of integers
sqrt 11 is a member of the set of irrational numbers
The answer is 5.19615242271 but if you round it to the nearest dp its 5.2