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Setler79 [48]
3 years ago
15

When adding several whole numbers, the result is the same no matter which two numbers are added first. In other words, (2+7)+9 i

s the same as 2+(7+9)
Mathematics
1 answer:
olga2289 [7]3 years ago
8 0

Answer:

This is true. Do you have a question?

Step-by-step explanation:

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Maria tests the effectiveness of an anti-depression drug by recruiting 500 participants and randomly assigning half e participan
Nady [450]

Answer:

D. The small p value and the small effect size suggest that the observed difference between the drug placebo groups are likely to be due to sampling error. This study should be replicated with a larger sample size.

Step-by-step explanation:

The p value is determined for any test before making a conclusion. If the p-value is smaller than critical value then we reject the null hypothesis which means that drug is not effective for the reducing depression. A very small p-value usually lesser than 0.05 indicates strong evidence against the null hypothesis.

6 0
3 years ago
How do you put 3/4% ,3/25%, and 11/20% as a decimal
Ahat [919]
First 3/4: this is actually 0.75. but the percent means we have to divide it by 100:

0.0075

3/25 is actually 0.12 (because it's equal to 12/100: i multiplied both numbers by 4)

and if it's a percent, again we "move to "move the point" or in other words divide by a 100:

0.0012 (think of dividing by 10 as of moving the coma to the left and adding zeros if there is noone to move)

the last one is equal to 55/100 (multiplied both by 5), so 11/20 % is 0.0055


I hope this was clear, let me know if you have questions!

4 0
3 years ago
Sally wants to purchase some school supplies. Notebooks cost $3 each and Pens cost $2 each. Sally is not allowed to purchase mor
n200080 [17]

Answer:

4n and 5p  

Step-by-step explanation:

Because if it the cost of each your mulitplying and because you wanting to just define the variable p for pen and n for notebook all a variable is a letter than let you know what something is for using in math later

7 0
3 years ago
The cost of 4 cartons of fresh cream is $7.96. What is the cost of 14 cartons WHOEVER ANSWERS FIRST IS BRAINLIEST​
podryga [215]

Answer:1.99*14= 27.86 Monies

Step-by-step explanation:

3 0
2 years ago
Suppose the rent for an apartment is $9,000 for the first year. The rent is expected
Maurinko [17]

Answer: $57,000

Step-by-step explanation:

Understand what is being asked. 1st yr is 9000. Yr 2 is 9000+1200= 10200. Yr 3 =10,200+1200=11,400. Yr 4 is 11,400 +1200=12,600 and Yr 5 is 12600+1200=13,800. Over the course of 5 yrs you are paying 9000+10200+11400+12600+13800 which has a total sum of $57,000.

8 0
4 years ago
Read 2 more answers
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