Using the mean concept, it is found that the value of the number that was removed was of 4.
<h3>What is the mean?</h3>
The mean of a data-set is given by the <u>sum of all observations in the data-set divided by the number of observations</u>.
The mean of five numbers is 8, hence, the sum of the numbers is given by:
S = 5 x 8 = 40.
If one of the five numbers is removed, the mean becomes 9, hence, the sum of the four numbers is given by:
S = 4 x 9 = 36.
The difference is:
40 - 36 = 4.
Hence, the value of the number that was removed was of 4.
More can be learned about the mean concept at brainly.com/question/25122507
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Answer:
The one moves up a tenth until it gets to 1.
Step-by-step explanation:
Answer:
3. Darlene completes in 32 minutes. Lillian has 50 minutes left. Lillian completes faster by 18 minutes or 3/10 faster. Dont have #4 yet.
Step-by-step explanation:
Note that both 121 and 289 are perfect fractions: 121 = 11^2 and 289 = 17^2.
Thus,
121 11^2
------- = ---------- = (11/17)^2.
289 17^2
The square root of this is merely 11/17.
