Use Moivre Formula to find cube roots of 64(cos219+isin219)
Cubic roots =∛[64(cos219+isin219)] = [64(cos219+isin219)]^(1/3)
= 4[(cos219+isin219)]^(1/3)=4[cos(219)/3+isin219/3)]=
= 1.169 + 3.82 i
Answer:
i think it is a
Step-by-step explanation:
Given:
Total savings = $400
Ratio of savings of Blake and Josh = 3:1
To find:
The saving of each.
Solution:
Let the savings of Blake and Josh are 3x and x respectively.
According to the question,


Divide both sides by 4.

Now,
Savings of Blake = 3(100)=300
Savings of Josh =100
Therefore, the savings of Blake and Josh are $300 and $100 respectively.
<em>Answer:</em>
<em>x = (k + c)/4</em>
<em>Step-by-step explanation:</em>
<em>4x - c = k</em>
<em>4x = k + c</em>
<em>x = (k + c)/4</em>
Answer:
C. {-9,-3}
Step-by-step explanation:
gives
if
. This gives
, which is valid.
It can also give
if
. This gives
, which is valid.
Hence the solutions are
.