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Setler [38]
4 years ago
9

Which expression represents the number 5i4+2i3+8i2+−4  rewritten in a+bi  form?

Mathematics
2 answers:
aniked [119]4 years ago
8 0
Remember
i²=-1 so
i³=-i
i⁴=1

so
5i⁴+2i³+8i²-4
5(1)+2(-i)+8(-1)-4
5-2i-8-4
-7-2i is the form
Vinvika [58]4 years ago
6 0

Answer:

Thats not the answer. I need help with this answer too.

These are the answers we're supposed to choose from:

−3+2i

5+0i

5−2i

​−3−4i

−3+0i

Which one is it?

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Please someone help meee! It’s advanced algebra
Virty [35]

Answer: I think it would be 80 feet I hole I’m correct.

Step-by-step explanation: So to explain 20 + 50 is 80 and that’s how I got the answer I am not 100% sure but I wanted to help you :-)

8 0
3 years ago
A coach of a baseball team orders hats for the players on his team. Each hat costs $9.95. The shipping charge for
maw [93]

Answer:

$125 > $9.95h + $5

Step-by-step explanation:

the total cost of the order has to be less than 125 dollars

so we are using '>'

five dollars are already going to be used up because of the shipping charge

the cost of the total amount of hats (without shipping) is what we are changing

so $125 > $9.95h + $5

5 0
3 years ago
If your starting salary is $40,000 and you receive a 3% increase at the end of every year, what is the total amount, in dollars,
zhuklara [117]
You can see this as.... you go to the bank, deposit your salary and they give you annually 3% in interest

how much will it be in 16 years?

\bf \qquad \qquad \textit{Future Value of an ordinary annuity}
\\\\
A=pymnt\left[ \cfrac{\left( 1+\frac{r}{n} \right)^{nt}-1}{\frac{r}{n}} \right]
\\\\

\bf \begin{cases}
A=
\begin{array}{llll}
\textit{original amount}\\
\textit{already compounded}
\end{array}
\begin{array}{llll}

\end{array}\\
pymnt=\textit{periodic payments}\to &40,000\\
r=rate\to 3\%\to \frac{3}{100}\to &0.03\\
n=
\begin{array}{llll}
\textit{times it compounds per year}\\
\textit{annually, thus once}
\end{array}\to &1\\

t=years\to &16
\end{cases}
\\\\\\
A=40000\left[ \cfrac{\left( 1+\frac{0.03}{1} \right)^{1\cdot  16}-1}{\frac{0.03}{1}} \right]
4 0
3 years ago
Read 2 more answers
What is the area of a parallelogram if the coordinates of its vertices are (0, -2), (3,2), (8,2), and (5, -2)?
Talja [164]

Answer: 20 sq. units .

Step-by-step explanation:

Let A(0, -2), B(3,2), C(8,2), and D(5, -2) are the points for the parallelogram.

First we plot these points on coordinate plane, we get parallelogram ABCD.

By comparing the y-coordinate of B and C with A and D , we get

height = 2+2 = 4 units

Also by comparing the x coordinates of A and D, we get base = 5-0= 5 units  

Area of parallelogram = Base x height

= 5 x 4 = 20 sq. units

Hence, the area of a parallelogram ABCD is 20 sq. units .

5 0
3 years ago
A rectangular area is to be fenced in with 600 feet of chicken wire. find the maximum area that can be enclosed.
Kryger [21]
600 ft is the perimeter of the area.
the area of the area is max when it's a square
the length of the square is 600/4 = 150
so the max area that can be enclosed is:
150×150 = 22500 ft square
4 0
4 years ago
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