If one-sixth of a certain number is four more than one-twelfth the number, the required number will be 48.
Let the unknown number be 'a'
One-sixth of the number is expressed as 1/6 a ..... 1
One-twelfth the number is also expressed as 1/12 a
Four more than one-twelfth the number will be written as:
1/12 a + 4 .... 2
Equating 1 and 2 will give:
1/6 a = 1/12 a + 4
a/6 = a/12 + 4
Collect the like terms
Find the LCM
Cross multiply
a = 12×4
a = 48
This shows that the required number is 48
Learn more on equations here: brainly.com/question/14034270
Answer:
well how menny hours per day?
Step-by-step explanation:
Mean is the middle
Median is the average
Mode is most often.
For this case we have the following equation:
We apply distributive property on the left side of the equation:
We add similar terms taking into account that, equal signs are added and the same sign is placed:
we subtract 6x on both sides of the equation:
We add 18 to both sides of the equation:
We divide by 8 on both sides of the equation:
Finally, the order of the steps is:
ANswer:
Answer: <u>56.9</u> years to <u>63.1</u> years.
Step-by-step explanation:
Confidence interval for population mean (when population standard deviation is unknown):
, where = sample mean, n= sample size, s= sample standard deviation, = Two tailed t-value for .
Given: n= 24
degree of freedom = n- 1= 23
= 60 years
s= 7.4 years
Two tailed t-critical value for significance level of and degree of freedom 23:
A 95% confidence interval on the true mean age:
Hence, a 95% confidence interval on the true mean age. : <u>56.9</u> years to <u>63.1</u> years.
Answer:
It’s the 3 one
Step-by-step explanation: