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Ahat [919]
3 years ago
15

The polynomial equation x3+x2=-9x-9 has complex roots +-3i . What is the other root? Use a graphing calculator and a system of e

quations.
–9
–1
0
1
Mathematics
2 answers:
tresset_1 [31]3 years ago
8 0
If the equation has roots of +-3i. The equation would be,
                                (x + 3i)(x - 3i) 
which is equal to x^2 - (3i)^2 = x^2 + 3. 
Using division either by synthetic or long method,
                                (x^3 + x^2 + 9x + 9)/(x^2 + 3) 
is equal to,
                                        x + 1 or x = -1
Thus, the answer is the second choice. 
evablogger [386]3 years ago
6 0

Answer:

It's B. on EtDtGte

Step-by-step explanation:

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Hannah earned $1536 in 8 years on an investment at a 4% annual simple interest rate. How much was Hannah’s investment? $4800 $30
Nonamiya [84]

Simple interest calculates interest on initial amount only. The investment by Hannah was : Option A: $4800

<h3>How to calculate simple interest amount if rate of interest is R% annually?</h3>

Suppose that the initial amount of investment is P

And the rate of simple interest is R% annually,

And the time of investment is T years.

Then, the amount of simple interest is calculated as:

I = \dfrac{P \times R \times T}{100}

For the given case, let the initial investment Hannah made was of $P

Then, the time of investment is T = 8 years, R% = 4%, and given that Hannah earned interest I = $1536

Putting values in the above formula, we get;

I = \dfrac{P \times R \times T}{100}\\\\1536 = \dfrac{P \times 8 \times 4}{100}\\\\P = \dfrac{153600}{32} = 4800

Thus,

The investment by Hannah was : Option A: $4800

Learn more about simple interest here:

brainly.com/question/5319581

5 0
2 years ago
How ti find absolute value
andreyandreev [35.5K]
Absolute value describes how far away a number is from 0

The absolute value of a number is always positive even if you are looking at the absolute value of a negative number.

Examples
The absolute value of 6 = 6
The absolute value of -6 = 6
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3 years ago
the home teams score exceeded 2 times the hosting teams score by 5 if the visiting teams score is x which expression represents
babunello [35]

Answer:

2x+5

Step-by-step explanation:

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Dmitriy789 [7]

Answer:

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