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Zina [86]
3 years ago
5

How are -1+2i and -1-2i solutions to x^2+2x+5=0

Mathematics
1 answer:
Nikolay [14]3 years ago
6 0

Step-by-step explanation:

just applieng quadratic form

- b  ±\frac{ \sqrt[2]{ {b}^{2}  -  4ac} }{2a}

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Mrs. Adams deposited $12,000 into an account that earns an annual simple interest rate of 3.25%. She makes no other deposits or
lisabon 2012 [21]

Answer:

<em>Mrs. Adams will earn $3,120 of interest at the end of year 8.</em>

Step-by-step explanation:

<u>Simple Interest</u>

In simple interest, the money earns interest at a fixed rate, assuming no new money is coming in or out of the account.

We can calculate the interests earned by an investment of value A in a period of time t, at an interest rate r with the formula:

I=A.r.t

Mrs. Adams deposited an amount of A=$12,000 into an account that earns an annual simple interest rate of r=3.25%. We must find the interest earned in t=8 years. The interest rate is converted to decimal as:

r=3.25/100=0.0325

The interest is then calculated:

I=12,000\cdot 0.0325\cdot 8=3,120

Mrs. Adams will earn $3,120 of interest at the end of year 8.

7 0
3 years ago
On a coordinate plane, a curved line with minimum values of (negative 0.44, negative 4.3) and (3, negative 4), and a maximum val
AleksandrR [38]

Answer:

The answers D

Step-by-step explanation:

Hope this helps

5 0
3 years ago
My friend asked me what the answer is as a Joke but I really don't know the answer someone please help. I don't want to look bad
jeka57 [31]

Answer:

d I believe

Step-by-step explanation:

so they take away certain blocks and they never replaced the 2 lines

4 0
2 years ago
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What countries do not use the metric system?
Georgia [21]
Burma,Liberia<span> and the </span><span>United States</span>
4 0
3 years ago
PLEASE HELPPPP!!!!!!!!!!!!!
harina [27]

Answer:

x^5+6x^4+9x^3−9x^2−27x−38/(this is where the fraction is.)x+3

Step-by-step explanation:

C is the answer

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