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Ivanshal [37]
3 years ago
13

Need help ASAP Tysm! :))

Mathematics
1 answer:
Mrrafil [7]3 years ago
4 0

Answer:

The answer is -86

Step-by-step explanation:

-7 squared is 49

49 × 2 = 98

12-98= -86

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Kelly rolls two number cubes 50 times. After each roll, she records whether the number on
lukranit [14]

Answer:

480

Step-by-step explanation:

first add the numbers in the table together and put the total as a denominator in a fraction then the amount of times 2 odd numbers appeared as the numerator then put another fraction with 2,000 as the denominator and divide 2,000 by the total then multiply the numerator by that answer to get the correct answer

5 0
3 years ago
Read 2 more answers
A psychological researcher did a study with a sample of 84 boys and found that the meam length of time that they remained engage
Varvara68 [4.7K]
Sample size= n= 84
sample mean= x = 107 s
population standard deviation =σ= 11.7

As, population standard deviation is given so we use the estimate:
                             x(+/-) z(α/2)(σ/√n)

At 99% Confidence interval means significance level is α=1-0.99= 0.01
So,
α/2=0.005
Now, z at α/2=0.005 
z= 2.576
Now, by putting values 
                               107(+/-)((2.576)(11.7/√84)) 
              ( 107-((2.576)(11.7/√84)), 107+((2.576)(11.7/√84))  )    
               (103.7, 110.288)                      


                                         
4 0
3 years ago
9 ft./s into miles per hour
nexus9112 [7]
First multiply 9 by 60 to find feet/minute: 9x60=540. Multiply that answer by 60 to get feet/hour: 540x60=32400. Divide that by 5,280 to get miles/hour: 32400/5280=6.14 roughly :)
4 0
3 years ago
The mean number of sick days per employee taken last year by all employees of a large city was 10.6 days. A city administrator i
Vsevolod [243]

Answer:

H0:μ=10.6

Ha:μ≠10.6

Step-by-step explanation:

you do not find out about the 12.9 until after stating the hypothesis.

7 0
3 years ago
Help me please I really needa turn this in by tmr
Blababa [14]
The flag should be 192 because 48 x 4 =192
8 0
3 years ago
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