Answer:
44yrs
Step-by-step explanation:
sum= 64
8yrs ago
Hanna = x - 8
Andrew =3x - 8
sum 8yrs ago
64 - <u>8</u> - <u>8</u> = 48 yrs
| \
Hanna's Andrew's
3x + x = 48
<u>4x</u> = <u>48</u>
4 4
x = 12
Andrew = 3x = 3 x 12 = 36( 8 yrs ago)
now = 36 + 8 = 44yrs
Hanna's = x = 12(8 yrs ago)
now = 12 + 8 = 20yrs
The answer to 38-45 is equal to -7
-6^2 - 28/4 + (-9)
Multiply -6 by it's exponent.
36 - 28/4 + (-9)
Divide 28 by 4
36 - 7 + (-9)
Subtract 7 from 36.
29 + (-9)
Add -9 to 29. This would be the same as subtracting 9 from 29(29-9).
Final Answer: 20
Answer:
z=i+2
,
z=i-2
Step-by-step explanation:
Remember that the quadratic equation
has the complex solutions
(this is the quadratic formula).
Apply this with a=1, b=-2i and c=-5 to get:
. Then the solutions are
and ![z_1=\frac{2i-4}{2}=i-2](https://tex.z-dn.net/?f=z_1%3D%5Cfrac%7B2i-4%7D%7B2%7D%3Di-2)
It isn't necessary to use De Moivre's formula.