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marusya05 [52]
3 years ago
11

A polynomial function has a root of –6 with multiplicity 1, a root of –2 with multiplicity 3, a root of 0 with multiplicity 2, a

nd a root of 4 with multiplicity 3. If the function has a positive leading coefficient and is of odd degree, which statement about the graph is true?
A.) The graph of the function is positive on (–6, –2).
B.) The graph of the function is negative on (negative infinity symbol, 0).
C.) The graph of the function is positive on (–2, 4).
D.) The graph of the function is negative on (4, infinity symbol).
Mathematics
2 answers:
densk [106]3 years ago
6 0
The correct answer for the question that is being presented above is this one: "C.) The graph of the function is positive on (–2, 4)." A polynomial function has a root of –6 with multiplicity 1, a root of –2 with multiplicity 3, a root of 0 with multiplicity 2, and a root of 4 with multiplicity 3. If the function has a positive leading coefficient and is of odd degree, then <span>C.) The graph of the function is positive on (–2, 4).</span>
siniylev [52]3 years ago
4 0

Answer:

C -2,4

Step-by-step explanation:

i got it right on edge

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A) x³y²if x = 2 and y = 4
kow [346]

Answer:

128

Step-by-step explanation:

x³y²if x = 2 and y = 4

x³*y²

(2)^{3} * (4)^{2}

(2*2*2)*(4*4)

(8)*(16)

128

8 0
1 year ago
Not sure need help ​
lord [1]

Answer:

9

Step-by-step explanation:

3-2i+8=23

5+2i+23

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i=-9

3 0
2 years ago
Numbers and expressions written in scientific notation are often used to represent measurement in a real-life situations. For ea
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1. My friend’s house is about (value) from mine
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2 years ago
Read 2 more answers
If a- b= 2 and ab= 15 then a3-b3?<br>a) 30 b) 98 c) 20 d) 60<br>full explanation please​
krek1111 [17]

Answer:

C) 20

Step-by-step explanation:

ab=15

5*3 = 15

which is a and which is b

a - b = +2

5 - 3 = + 2

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a = 5 and

b = 3

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7 0
2 years ago
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A recent article in The Wall Street Journal compared the cost of adopting children from China with that of Russia. For a sample
denpristay [2]

Answer:

We can conclude the mean cost is larger for adopting children from Russia.

Step-by-step explanation:

To answer this question we can perform an hypothesis testing on the differences of the means with the following null and alternative hypothesis:

H_0: \mu_1\leq\mu_2\\\\H_1: \mu_1>\mu_2

The significance level we assume is 0.05.

First we calculate the mean standard error:

MSE=\frac{SSE}{df}=\frac{n_1\sigma_1^2+n_2\sigma_2^2}{(n_1-1)+(n_2-1)} =\frac{16*835^2+18*1545^2}{16-1+18-1} =1,691,314

The harmonic mean of the sample sizes is:

n_h=\frac{2}{1/n_1+1/n_2}=\frac{2}{0.0625+0.0556}=\frac{2}{0.1181}=16.94

Then we can calculate the estimated standard deviation as:

\sigma=\sqrt{\frac{2MSE}{n_h} } =\sqrt{\frac{2*1691314}{16.94} } =447

The t-statistic can be calculated as:

t=\frac{\Delta M-\Delta \mu}{\sigma}=\frac{(11045-12840)-0}{447} =\frac{-1795}{447}= -4.015

The degrees of freedom are df=n_1+n_2-2=18+16-2=32.

We can look up the P-value in a table or applet. For t=-4.015 and df=32, the P-value is 0.00017.

The P-value is smaller than the significance level, so the effect is significant and the null hyphotesis (China cost is equal or less than in Russia) is rejected.

We can conclude the mean cost is larger for adopting children from Russia.

4 0
3 years ago
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