22
Any irrational number, when added to 13, will produce an irrational number.
To find the average, add up all the numbers and then divide the sum by the number of numbers you added. 7+11+21=39 39/3=13 The average is 13.
Any irrational number will do.
24
What number when doubled has seven added and gives 13?
4
Any irrational number, when added to 13, will produce an irrational number.
Any irrational number, when added to 13, will produce an irrational number.
To find the average, add up all the numbers and then divide the sum by the number of numbers you added. 7+11+21=39 39/3=13 The average is 13.
13
-13 is the number must you subtract from -13 to get a difference of 0
5
It is: 13+x+7x or as 13+8x
Any irrational number will do.
24
Average= All of your numbers added together divided by how many numbers you have. 13+17=30 30/2=15
The number is 121/2.