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Oksi-84 [34.3K]
3 years ago
5

A third degree polynomial equation with rational coefficients that has roots -4 and 2+i

Mathematics
1 answer:
White raven [17]3 years ago
8 0
If one of the roots is 2+i, another must be 2-i.  We can express this polynomial as (x+4)(x-2-i)(x-2+i).  This expands to x^3-11x+20.
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the spinner is divided in to 8 equal sections. if the arrow lands on a number, what is the probability that it will land on a 1
Tcecarenko [31]

25% there are 8 sections and there are two you are trying to land on making it 2/8=25%

3 0
3 years ago
Suppose a teacher finds that the
horsena [70]

Answer:

Scores = 8

Step-by-step explanation:

To solve variation problems, you make mild assumptions and analogies

Let's score be represented with S

Let's Absences be represented with A.

Therefore

S varies inversely as A

S ~ 1/A

S = K/A

The K represents a contant notation so that we can easily figure the variation problem.

When Absences were 2

Scores were 12

S = K/A

12 = K / 2

Cross Multiply.

K = 24.

It means that, S = 24 / A.

For a student with 3 absences, the score would be:

S = 24 / A

S = 24 / 3

S = 8

Math is fun!

5 0
4 years ago
Your weekly base salary is $150. You earn $20 for each phone you taht you sell. The company policy is that as a part-time employ
Eduardwww [97]

Answer:

You can sell at least 40 phones each week.

Step-by-step explanation:

Given that:

Weekly base salary = $150

Earning on each phone = $20

Maximum amount that can be earned each week = $950

Let,

m be the number of phones.

20m + 150 ≤ 950

20m ≤ 950 - 150

20m ≤ 800

Dividing both sides by 20

\frac{20m}{20}\leq \frac{800}{20}

m ≤ 40

Hence,

You can sell at least 40 phones each week.

6 0
3 years ago
I only need help with justifying the step in solving the problem. Please help!
ale4655 [162]

Well, for method one the first step we have is distribution, then combining like terms, then property of subtraction, then division.  For method two, I'm not entirely sure what they did there.  I've never done math like that.  Sorry I can't help you out all the way.

-TTL

3 0
4 years ago
Read 2 more answers
Which expression is 1/2 as large as 486-466
m_a_m_a [10]

Answer: 20-10

Step-by-step explanation: 486-466 is 20. Half of 20 is 10. Any expression that equals ten is 1/2 as large as 486-466.

4 0
3 years ago
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