1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
brilliants [131]
3 years ago
13

Which expression has the value of 12?

Mathematics
1 answer:
Natali5045456 [20]3 years ago
6 0

Answer:

A,

Step-by-step explanation:

You might be interested in
Please solve this I need help<br> +
Vesnalui [34]

Answer:

go doawload Math scanner app

hope it's help you

4 0
3 years ago
A zoologist is studying four very closely related feline species. She wishes to compare their gestation periods. An observationa
diamong [38]

Answer:

p_v= 0.01

Since the significance level is 0.05 we see that pv so we have enough evidence to reject the null hypothesis. And the best conclusion for this case would be:

b. at least some, but not all, of the gestation periods across all four species are the same

Because is only to identify if AT LEAST one mean is different, NOT to conclude that the all the means are different.

Step-by-step explanation:

Previous concepts

Analysis of variance (ANOVA) "is used to analyze the differences among group means in a sample".  

The sum of squares "is the sum of the square of variation, where variation is defined as the spread between each individual value and the grand mean"  

Solution to the problem

The hypothesis for this case are:

Null hypothesis: \mu_{A}=\mu_{B}=\mu_{C}= \mu_D

Alternative hypothesis: Not all the means are equal \mu_{i}\neq \mu_{j}, i,j=A,B,C,D

In order to find the mean square between treatments (MSTR), we need to find first the sum of squares and the degrees of freedom.

If we assume that we have p=4 groups and on each group from j=1,\dots,p we have n_j individuals on each group we can define the following formulas of variation:  

SS_{total}=\sum_{j=1}^p \sum_{i=1}^{n_j} (x_{ij}-\bar x)^2  

SS_{between}=SS_{model}=\sum_{j=1}^p n_j (\bar x_{j}-\bar x)^2  

SS_{within}=SS_{error}=\sum_{j=1}^p \sum_{i=1}^{n_j} (x_{ij}-\bar x_j)^2  

And we have this property  

SST=SS_{between}+SS_{within}  

And in order to test this hypothesis we need to ue an F statistic and for this case the p value calculated is

p_v= 0.01

Since the significance level is 0.05 we see that pv so we have enough evidence to reject the null hypothesis. And the best conclusion for this case would be:

b. at least some, but not all, of the gestation periods across all four species are the same

Because is only to identify if AT LEAST one mean is different NOT to conclude that the all the means are different.

8 0
3 years ago
The equation:
serious [3.7K]

2x + 4 =  - 8 + 5x \\ 12 = 3x \\ x = 4

5 0
3 years ago
Marjorie is playing a new board game the rule state that when a player's piece lands on a red square the player must pay a penal
alexdok [17]

Interpreting the situation, it is found that Marjorie will have 240 left after paying her penalty.

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

  • When the piece lands on the red square, the penalty is equal to <u>30 times the sum they roll on two numbers.</u>
  • Marjorie rolls 4 and 2, thus, the sum is 6.
  • The penalty is of 6 \times 30 = 180
  • She currently has 420, the penalty removes 180, thus, she will have 420 - 180 = 240 left after paying her penalty.

A similar problem is given at brainly.com/question/12166019

6 0
2 years ago
Log4 216-log4 8 =log4 x
tekilochka [14]
216/8= 27. X= 27. Subtract you divide
4 0
3 years ago
Other questions:
  • Circle the subjects to which the number - 105 belongs :
    13·1 answer
  • The picture shows a barn door:
    15·1 answer
  • Over what interval is the graph of f(x) = -(X + 8)2 – 1 decreasing?
    7·2 answers
  • Drag the expressions into the boxes to correctly complete the table.
    9·1 answer
  • Please help asap! I need this done tomorrow ​
    10·1 answer
  • Which days of the week are happy number days
    12·1 answer
  • • Now suppose a cicada comes out every 8 years instead of 7 years. How many years will go by before the cicada and predator appe
    14·1 answer
  • Which property is BEST to use when simplifying (0.58+0.32)+ 0.68
    5·1 answer
  • Ivan and Tanya share £150 in the ratio 4 : 1<br> Work out how much more Ivan gets compared to Tanya.
    5·1 answer
  • Pls help me out<br> 6x + 12x = 90
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!