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Mnenie [13.5K]
3 years ago
7

I need help on task 7 please

Mathematics
1 answer:
NARA [144]3 years ago
8 0
I cant see the task... You need to put it on here
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A man who moves to a new city sees that there are two routes he could take to work. A neighbor who has lived there a long time t
sergiy2304 [10]

Answer:

0.3 to 2.3 min

Step-by-step explanation:

n1=n2=10

x1=48

x2=49

s1=4

s2=1

Determine the deegres of freedom.

\delta=\frac{(\frac{s_1^2}{n_1}+\frac{s_2^2}{n_2})^2}{\frac{(\frac{s_1^2}{n1})^2}{n_1-1}+\frac{(\frac{s_1^2}{n1})^2}{n_2-1}}=10.14

t=2.037 (student's appendix)

E=t\sgrt(\frac{s_1^2}{n_1}+\frac{s^2_2}{n_2})=1.3

(x_1-x_2)-E=(48-49)-1.3=-2.3

(x_1-x_2)+E=(48-49)+1.3=0.3

We are 95% confident that average commuting time for  rute A is between 0.3 and 2.3 min shorter than for rute B.

5 0
4 years ago
Give me your tiktoks ill follow you!!!
frozen [14]
Unban_mh, there you go!.
5 0
2 years ago
Read 2 more answers
Jaron walked 15 blocks north and then 3 blocks west to school. Marisol walked 3 blocks east and then 15 blocks south to school.
Svet_ta [14]

Answer:

sqrt(15² + 3²) = sqrt(15² + 3²)

Step-by-step explanation:

Using Pythagoras:

15 blocks North = 15 blocks south (direction opposite to each other)

3 blocks west = 3 blocks east (directions opposite to each other)

Hence distance traveled (d) :

JARON

D = sqrt(15² + 3²)

MARISOL:

D = sqrt(15² + 3²)

Hence ;

sqrt(15² + 3²) = sqrt(15² + 3²)

5 0
3 years ago
3x-9=3(x-3) how many solutions​
Colt1911 [192]

Answer:

All Real Numbers

Step-by-step explanation:

Step 1:

3x - 9 = 3 ( x - 3 )        Equation

Step 2:

3x - 9 = 3x - 9       Multiply

Step 3:

- 9 = - 9       Subtract 3x on both sides

Answer:

All Real Numbers

Hope This Helps :)

4 0
3 years ago
Can u explain how u got the answer
Tems11 [23]

Answer:

10 degrees Celsius

Step-by-step explanation:

So, the question is asking for the difference between -8 and 2.

-----------------------------------------------------------------------------------------------------------------

Explanation 1:

2 - (-8) = ?

2 + 8 = ?

10 = ?

-----------------------------------------------------------------------------------------------------------------

Explanation 2:

|2| - 0 = 2

|-8| - 0 = 8

2 + 8 = 10

6 0
3 years ago
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