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2 years ago

Simplify the expression. 4p−5(p+6)

Mathematics

2 answers:

Helen [10]2 years ago

6 0

4p -5 (p +6)

4p -5p -30

-p -30

—— the answer is ——-
-p -30

ELEN [110]2 years ago

5 0

4p - 5(p + 6)

= 4p - 5p - 30

= -p - 30

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Answer: - p - 30
-------------------------------------------------

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A sample of 5 buttons is randomly selected and the following diameters are measured in inches. Give a point estimate for the pop

Helen [10]

Answer:

$s^2 = \frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}$

But we need to calculate the mean with the following formula:

$\bar X = \frac{\sum_{i=1}^n X_I}{n}$

And replacing we got:

$\bar X = \frac{ 1.04+1.00+1.13+1.08+1.11}{5}= 1.072$

And for the sample variance we have:

$s^2 = \frac{(1.04-1.072)^2 +(1.00-1.072)^2 +(1.13-1.072)^2 +(1.08-1.072)^2 +(1.11-1.072)^2}{5-1}= 0.00277\ approx 0.003$

And thi is the best estimator for the population variance since is an unbiased estimator od the population variance $\sigma^2$

$E(s^2) = \sigma^2$

Step-by-step explanation:

For this case we have the following data:

1.04,1.00,1.13,1.08,1.11

And in order to estimate the population variance we can use the sample variance formula:

$s^2 = \frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}$

But we need to calculate the mean with the following formula:

$\bar X = \frac{\sum_{i=1}^n X_I}{n}$

And replacing we got:

$\bar X = \frac{ 1.04+1.00+1.13+1.08+1.11}{5}= 1.072$

And for the sample variance we have:

$s^2 = \frac{(1.04-1.072)^2 +(1.00-1.072)^2 +(1.13-1.072)^2 +(1.08-1.072)^2 +(1.11-1.072)^2}{5-1}= 0.00277\ approx 0.003$

And thi is the best estimator for the population variance since is an unbiased estimator od the population variance $\sigma^2$

$E(s^2) = \sigma^2$

3 0

3 years ago

2. The population of Small Town, Alabama was 13,128 in 1990 but the town is growing at a rate

belka [17]

Answer i've done the math multiple times and everytime i get the answer 21,950. i don't think i'm doing the math wrong, maybe try asking the teacher or whoever is the one grading it cause it could be a typo or something like that.

Step-by-step explanation:

7 0

3 years ago

What is 68% as a fraction

alukav5142 [94]

Answer:

fraction

3/4

decimal's

0.68

that's my answer please have a great day

8 0

1 year ago

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Example 5 Given m angle7=38^ and m angle10=102^ the measure of each missing angle

kotykmax [81]

angle 1 - 78

angle 2- 102

angle 3- 78

angle 4- 102

angle 5- 38

angle 6- 142

angle 8- 142

angle 9- 78

angle 11- 78

angle 12- 102

angle 13- 38

angle 14- 142

angle 15- 38

angle 16- 142

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2 years ago

An earthquake with a rating of 3.3 is not

stiks02 [169]

Answer:

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Step-by-step explanation:

It usually works to follow instructions:

3.3 = log(x) . . . . . substitute known values into the equation

10^3.3 = x . . . . . take antilogs

1995.26 = x . . . . simplify, round to hundredths

5 0

3 years ago