Answer:
1/2x+7
Step-by-step explanation:
X=27
81 = 3x= 27
So x means 27
Answer:
B
Step-by-step explanation:
you are comparing percent to percent and total boys to total class.
Answer:To calculate the standard deviation of those numbers:
1.Work out the Mean (the simple average of the numbers)
2.Then for each number: subtract the Mean and square the result.
3.Then work out the mean of those squared differences.
4.Take the square root of that and we are done!
Step-by-step explanation: