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Aleksandr-060686 [28]
3 years ago
12

Show work plz for I can understand

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

Answer:

c = - 2

Step-by-step explanation:

Since (z - 3) is a factor of p(z) then z = 3 is a root and p(3) = 0

p(3) = 3³ + 9c - 4(3) + 3 = 0, hence

27 + 9c - 12 + 3 = 0 ⇒ 9c = - 18 ⇒ c = - 2



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A random sample has been selected from a population. The point estimate = 78.65 and margin of error E = 8.24 for a 90% confidenc
fiasKO [112]

Answer:

90% confidence interval: (70.41,86.89)

Step-by-step explanation:

We are given the following in the question:

Point estimate = 78.65

Margin of error, E = 8.24

Confidence level = 90%

Significance level = 10%

Formula:

\text{Point estimate} \pm \text{Margin of error}

Putting the values, we get,

z_{critical}\text{ at}~\alpha_{0.10} = \pm 1.64

78.65 \pm 8.24 = (70.41,86.89)

(70.41,86.89) is the required 90% confidence interval.

5 0
3 years ago
100,000 random people were tested for Condition A. Roberto's doctor told him he tested positive for Condition A. If the test is
Studentka2010 [4]
The answer would be: <span>99.0%
</span>
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7 1
3 years ago
Read 2 more answers
B+7 ÷ 2a for a = -4 b= -6
Evgen [1.6K]

-6+7 / 2(-4)=

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PEMDAS

6 0
3 years ago
PLEASE PLEASE PLEASE HELP I NEED IT <br><br> What is the sum of the series?
JulsSmile [24]
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n\left(a_1+\frac{d\left(n-1\right)}{2}\right)

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gogolik [260]
15 plates = $5.99 (wow that's expensive)

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Answer: They will need 7 packs which costs in total
$41.93
4 0
3 years ago
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