All categories

3 years ago

Add. [12 −6 −10]+[−2 14 5 15]

Mathematics

1 answer:

lions [1.4K]3 years ago

8 0

Answer:

Step-by-step explanation:

You might be interested in

Gribbles are small, pale white, marine worms that bore through wood. While sometimes considered a pest since they can wreck wood

Stells [14]

<u>Answer with explanation:</u>

As per given , we have

A sample of 50 gribbles finds an average length of 3.1 mm with a standard deviation of 0.72.

i.e. n= 50

Degree of freedom = n-1=49

$\overline{x}=3.1\ mm$

$s=0.72\ mm$

The point estimate of the population mean is equals to the sample mean.

i.e. The best estimate for the length of gribbles= 3.1 mm

Also, population standard deviation is unknown , then the confidence interval would be :

$E=t_{\alpha/2, df}\dfrac{s}{\sqrt{n}}$

For df= 49 and significance level of 0.05 , the t- value (using t-distribution table) would be :

$t_{0.05/2, 49}=t_{0.025, 49}= 2.010$

Now, Margin of error : $E=(2.010)\dfrac{0.72}{\sqrt{50}}$

$=0.204664986747\approx0.20$

95% confidence interval : $(\overline{x}-E,\ \overline{x}+E)$

$i.e.\ (3.1-0.20, 3.1+0.20)=(2.90,\ 3.30)$

3 0

4 years ago

Someone help with this please

Rzqust [24]

Hey there,

Your correct answer would be "It is a vertex at it origin"

Hope this helps.

~Jurgen

7 0

4 years ago

Which of the following is a true polynomial identity?

AlladinOne [14]

C or d i think is the correct answer

5 0

3 years ago

Identify the angle relationship. Which equation can be used to solve for x?<br> (4x + 1)<br> 170

Mice21 [21]

Answer:

680x + 170

Step-by-step explanation:

calculate the product

4 $x$ x170 +170=

680x+ 170

4 0

3 years ago

Evaluate 7a -5b when a=5 and b=4

abruzzese [7]

Answer:

Step-by-step explanation:

plug in the numbers to the equation

7(5)+5(4)=55

6 0

3 years ago