Question

Find the missing value of 3, 5, 7, 9,______ mean =7

Answer 1

11

Explanation:

3+5+7+9+11=35

35/5=7

Mean is found by adding all the numbers together and dividing it

Answer 2

x = 11

Explanation:

The mean is found by adding all the numbers and dividing by the number of numbers

x is the unknown number

(3+5+7+9+x)/5 = 7

Multiply each side by 5

(3+5+7+9+x)/5 *5 = 7*5

(3+5+7+9+x) = 35

Combine like terms

24+x = 35

Subtract 24 from each side

24+x-24 = 35 -24

x = 11