Hey there!
Let's say that Julia has 50 CDs. We would plug this into c in the expression we've been given to find the number of CDs that Ahmed has.
c = 50
1/2c + 5
1/2(50) + 5
25 + 5
30
So, if Julia has 50 CDs, Ahmed has 30. We used the expression to figure that out and, therefore, that's why it was created.
Your answer will be the number of CDs that Ahmed has.
Hope this helped you out! :-)
About 405 hours
i got the answer by multiplying
hope this helped you!
The mean is calculated by adding up all of the given numbers and dividing by the number of numbers.
Lets, for ease of understanding, say that the first three number were 64...
Mean=(64+64+64)/3=192/3=64
Now, lets solve for the mean where 'x' is the unknown fourth number and 128 is the mean. (since, the answer said that when the fourth number was added the mean, 64, was doubled '64*2=128')
128=(64+64+64+x)/4
128=(192+x)/4
Multiply both sides by 4
512=192+x
subtract 192 from both sides
320=x
The missing number is 320..
Now lets double check our work.
Mean=(64+64+64+320)/4=512/4=128
Answer=320
