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2 years ago

Plz help with d I really need it

Mathematics

2 answers:

Romashka [77]2 years ago

5 0

Answer:c 4

Step-by-step explanation:because ti is in the middle

Arada [10]2 years ago

3 0

Answer:

1+1+2+3+3+3+4+4+4+4+4+5+5+5+5+6+6+6+7+7/20 is 78.35

Step-by-step explanation:

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4(−5z+2)+(−6) using distributive property

amid [387]

Answer:

Step-by-step explanation:

-20z+8+(-6)

-20z+2

7 0

2 years ago

Read 2 more answers

11. An astronaut travels 32 million miles to Mars, turns around and comes back the same way, ending up exactly where he started

Andrews [41]

Answer:

Step-by-step explanation:

Since displacement is the distance between the journey starting point and the final point if they both are the same the difference becomes zero and hence the displacement.

Displacement = final point - initial point

(both are same)

= same - same

= 0

6 0

2 years ago

What is an example of when you would want consistent data and, therefore, a small standard deviation?

steposvetlana [31]

Answer:

12.1, 12.3,12.4,12.5,12.3,12.1,12.2

$\bar X= \frac{12.1+12.3+12.4+12.5+12.3+12.1+12.2}{7}=12.271$

And for the standard deviation we can use the following formula:

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

And after replace we got:

$s = 0.1496$

And as we can ee we got a small value for the deviation <1 on this case.

Step-by-step explanation:

For example if we have the following data:

12.1, 12.3,12.4,12.5,12.3,12.1,12.2

We see that the data are similar for all the observations so we would expect a small standard deviation

If we calculate the sample mean we can use the following formula:

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

And replacing we got:

$\bar X= \frac{12.1+12.3+12.4+12.5+12.3+12.1+12.2}{7}=12.271$

And for the standard deviation we can use the following formula:

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

And after replace we got:

$s = 0.1496$

And as we can ee we got a small value for the deviation <1 on this case.

8 0

2 years ago

3(x-2) write in a word

lina2011 [118]

Answer:

3x-6

Step-by-step explanation:

Thats the answer. .

3 0

3 years ago

Read 2 more answers

One morning, the temperature was -5 ferenhight. By noon, the temperature had increased 12 degrees. What was the temperature at n

Papessa [141]

Answer:

$Noon\ Temperature = 7F$

Step-by-step explanation:

Given

Initial Temperature = -5F

Change (by noon) = 12 degrees

Required

Determine the temperature at noon

The temperature by noon is calculated as thus;

$Noon\ Temperature = Initial\ Temperature + Change$

Substitute values for Initial temperature and change

$Noon\ Temperature = -5F + 12$

$Noon\ Temperature = 7F$

Hence, the temperature at noon is 7F

6 0

3 years ago