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jolli1 [7]
3 years ago
6

HELLPPPP LOTS OF POINTS

Mathematics
2 answers:
kakasveta [241]3 years ago
6 0

Answer:

Her mom and 8/21 needs to be washed.

Step-by-step explanation:


slega [8]3 years ago
4 0

Hi There!

Step-by-step explanation:

Find Common Denominators,

2/7 = 6/21

1/3 = 7/21

Her son washed the most lanudry.

6/21 + 7/21 = 13/21

21/21 - 13/21 = 8/21

Answer:

8/21 of the laundry still needs to be washed.

Hope This Helps :)

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A major airline is concerned that the waiting time for customers at its ticket counter may be exceeding its target average of 19
sertanlavr [38]

Answer:

a) Statement is true

b) Statement incorrect. Company goal is to attend customer at 190 second at the most. So test should be one tail test  (right)

c) We have to reject H₀, and differences between sample mean and the hypothesized population mean should not be attributed only to sampling error

Step-by-step explanation:

a)  as the significance level is = 0,02  that means  α = 0,02 (the chance of error type I )  and the β (chance of type error II   is

1  -  0.02  =  0,98

b) The company establishe in 190 seconds time for customer at its ticket counter (if this time is smaller is excellent ) company is concerned about bigger time because that could be an issue for customers. Therefore the test should be a one test-tail to the right

c) test statistic

Hypothesis test should be:

null hypothesis                H₀   =  190

alternative hypothesis    H₀   >  190

t(s)  =  ( μ  -  μ₀ ) / s/√n      ⇒   t(s)  = ( 202 - 190 )/(28/√100 )

t(s)  = 12*10/28

t(s)  = 4.286

That value is far away of any of the values found for 99 degree of fredom and between  α  ( 0,025 and 0,01 ). We have to reject H₀, and differences between sample mean and the hypothesized population mean should not be attributed only to sampling error

If we look table  t-student we will find that for 99 degree of freedom and α = 0.02.

3 0
3 years ago
How do i do this problem (7 3/8) - (4 5/8)
Sergio [31]

Answer:

52

Step-by-step explanation:

52 52 52 52 52 52 52 52


4 0
3 years ago
Is (8, 3) a solution to the system?<br> - 2 + 4y = 4<br> - 2 + 3y = 1
AURORKA [14]

Answer:

No, it's not a solution.

Step-by-step explanation:

-2 + 4(3) = 4

-2 + 12 = 10

-2 + 3(3) = 1

-2 + 9 = 7

3 0
3 years ago
Please help! will give brainliest!
sergeinik [125]
Answer:

Arc PL = 62
Arc QPS = 258

Explanation:

17. 5x-19 = 2x+11

18.

16x - 28 = 180.
7 0
2 years ago
3.8 km/sec to miles/year <br><br> HELP ASAP
Leokris [45]
Hope this picture helps! ;) Ignore the stuff around it ($12 or the triangle)

6 0
2 years ago
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