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IRINA_888 [86]
4 years ago
9

Evaluate the expression below for the given values.

Mathematics
1 answer:
dangina [55]4 years ago
3 0
6 - -3.
6 + 3.

Answer is 9.
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Help please! Will put brainliest
nata0808 [166]

Answer:

6

Step-by-step explanation:

4 0
3 years ago
Based on experience, the probability that an incoming email is spam (an undesired message of solicitation) is 38%. If three emai
SCORPION-xisa [38]

Answer:

0.0549

0.7617

0.2383

Step-by-step explanation:

Given that:

Probability that incoming email is spam ;

P(spam) = 0.38

If three emails are in my inbox, what is the probability that:

A. All three messages are spam.

P(1st message being spam) * p(second message being spam) * p(3rd message being spam)

= (0.38) * (0.38) * (0.38)

= 0.054872

= 0.0549

B. At least one of the three messages are spam.

1 - p(none of the 3 messages are spam)

P(none of the 3 messages are spam)

P(not spam) = 1 - p(spam) = 1 - 0.38 = 0.62

1 - [P(not spam) * p(not spam) * p(not spam)]

1 - (0.62 * 0.62 * 0.62)

= 1 - 0.238328

= 0.761672

= 0.7617

C. None of the three messages are spam.

P(not spam) = 1 - p(spam) = 1 - 0.38 = 0.62

P(not spam) * p(not spam) * p(not spam)

(0.62 * 0.62 * 0.62)

= 0.238328

= 0.2383

7 0
3 years ago
The vertex of a parabola is (0,0) and the focus is (0,2) what is the equation of the parabola
Talja [164]
The general form for this parabola ix x^2 = 4ay  where the focus is (0,2)

a = 2 so we have:-

x^2 = 4(2)y

y = (1/8) x^2 is the answer.
7 0
4 years ago
3, _ 27, 81, 243 what is the next number in the sequence
Lena [83]

Answer:

3,9,27,81,243,729,2187

Step-by-step explanation:

each number up times it by 3

3x3=9 ,9×3=27, 27×3=81,81×3=243,243×3=729,729×3=2187 and so on

4 0
3 years ago
In a random sample of fivefive microwave​ ovens, the mean repair cost was ​$75.0075.00 and the standard deviation was ​$13.0013.
Radda [10]
<h2>Answer with explanation:</h2>

As per given , we have

Sample size : n= 5

Degree pf freedom = : df= 5-1=4

\mu=\$75.00

\sigma=\$13.00

Significance level for 90% confidence = \alpha=1-0.90=0.1

Using t-value table , t-critical value for 90% confidence:

t_{\alpha/2, df}=t_{0.05, 4}=2.132.

Margin of error of \mu: E=t_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}\\\\(2.132)\dfrac{13}{\sqrt{5}}=12.3949720129\approx12.39

Interpretation : The repair cost will be within $12.39 of the real population mean value \mu 90% of the time.

7 0
4 years ago
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