The number is 9, because 9 + 2/3(9) is 15, so 9 + 6 = 15 because 2/3 of 9 is 6.
x+15
2*(15 + N)
Their sum is 15.
To find the missing number in a data set with a mean of 15, you need to know the total number of values (n) in the data set and the sum of the existing numbers. The mean is calculated as the sum of all values divided by n. If you have the sum of the existing numbers, you can rearrange the formula: missing number = (mean × n) - sum of existing numbers. Without additional information, the exact missing number cannot be determined.
15
27
The sum is 328.
x+15
N + 15
five times the sum of a number and 8 is -15.
2*(15 + N)
Their sum is 15.
15
x+15 if you are trying to find the value of x it would be x+15 x=-15
It is 15 + 1x.
(x + 15)
Average = sum/number = 153/4 = 38.25