Question

AVERAGE OF FOUR NUMBERS IS 9. YOU HAVE 5, 9, AND 12. WHAT IS THE FOURTH NUMBER

Answer 1

Answer: 10

Explanation:

You can create an equation for this and then solve. Let's call that 4th number x

Add all the numbers and divide by how many. That is your average

(5+9+12+x)/4 =9 >Multiply both sides by 4

5+9+12+x =36 >Simplify numbers on left

26 + x = 36 > subtract 26 from both sides

x = 10

Answer 2

10

Explanation:

9x4=36

36-5-9-12=10

Therefore, your answer is 10

To double check, redo math opposite:

5+9+10+12=36

36 divided by 4 = 9