The mean of x,x?1,x+7, and x+10 is 9. Find the value of x.
MATHEMATICS
SAT 2021
The mean of x,x?1,x+7, and x+10 is 9. Find the value of x.
- A. 5
- B. 4
- C. 9
- D. 8
Correct Answer: A. 5
Explanation
Recall how to find the mean: Mean/Average=Sum of all values/Number of values (x+(x?1)+(x+7)+(x+10))/4=9 4x+16=36 4x=20 x=5
Post an Explanation Or Report an Error
If you see any wrong question or answer, please leave a comment below and we'll take a look. If you doubt why the selected answer is correct or need additional more details? Please drop a comment or Contact us directly. Your email address will not be published. Required fields are marked *