Answer:
The standard deviation is 11 points
Step-by-step explanation:
To calculated the z-score of a value x, we use the following equation:
Where m is the mean, s is the standard deviation and z is the z-score.
If we solve this equation for s, we get:
So, replacing z by 2, m by 153 and x by 175, we get:
Therefore, the standard deviation is 11 points
I believe that the missing letter would be E and S which would be in between S and T
We first write the word in math as x+3/5 = 5/7. Now we cross multiply our fractions and rewrite them with the LCD of 5 and 7. Our equation now looks like x + 21/35 = 25/35. We simplify our equation by subtracting 21/35 from both sides to get x = 4/35. 4/35 is already in lowest terms so it is our answer.
Answer: 38.9
Step-by-step explanation:
Add all the numbers together and divide the sum by how many numbers there are.
