13. question in attachment

Answer:
19
Step-by-step explanation:
The mean is the sum of all the value divided by the number of values. Set up an expression to match the statement.
[tex]\frac{10 + 12 + x +9+18+14+20+23+25+10}{10}=16\\ 10+12+x+9+18+14+20+23+25+10=160\\141+x = 160\\x=19[/tex]
Answer:
Step-by-step explanation:
First put it in equation form
[tex]\frac{(10+12+x+9+18+14+20+23+25+10)}{10} = 16[/tex]
Add up all the numbers in the brackets
[tex]\frac{(141+x)}{10} = 16[/tex]
Solve for x
[tex]141+x = 16 *10\\141+x=160\\x=160-141\\x=19[/tex]