cant see the pic
please type out the question
so that i can help u
Answer:
Step-by-step explanation:
to use distributive property
you have to put the 4 inside the paranthese and multiply
4a+20 is your answer
pls mark me brainliest
Complex numbers are divided into two parts; real and imaginary parts. The value of Z3 is 
Given that:


Since O is the origin, then:

This means that:

So, we have:

Collect like terms


Hence, complex number Z3 is 
Read more about complex numbers at:
brainly.com/question/18509723
'Commutative' means you can work it in the other direction without changing it.
But 1/2 is not the same number as 2/1 . So I guess division is NOT commutative.