Answer:
EXPLAIN
Step-by-step explanation:EXPLAIN
EXAMPLE
Answer:
The complex number has Cartesian form
.
Step-by-step explanation:
First, we need to recall the definition of when is a complex number:
.
Then,
. (I)
Now, recall the definition of the complex exponential:
.
So,
(we use that .
Thus,
Now we group conveniently in the above expression:
.
Now, substituting this equality in (I) we get
.
Thus,
.
Answer:
<em>The expression is </em><em>P - 5</em>
Step-by-step explanation:
Rihanna already made a deposit of $5 to buy the necklace (given)
Full price of necklace = P
Let m = how much Rihanna has left to pay
Full price of necklace = amount paid + amount left to pay
= 5 + m
So we equate the two full necklace prices
5 + m = P
m = P - 5
Therefore, the amount Rihanna owes before tax = P - 5
Presenting your problem symbolically:
3
--
7
==== becomes
2
---
4
3
---
7
====
1
---
2
To divide by 1/2, multiply by 2/1:
3 2
-- * ---
7 1
Multiplying, we get 6/7.