For the data set 7, 5, 10, 11, 12, the mean, x, is 9. What is the standard deviation? The formula for the sample standard deviation is s = 1 Z(x-x)? Vn-1 Use the table to help you. X - X (x - 2)2 4 -2 5 -4 1 2 4 9 Sum = Round your answer to the nearest tenth. ( A. 2.6
B. 6.8
C. 8.5
D. 2.9

Acarnival sold tickets for $1.50 for adults and $1.00 for students. there were 54 tickets sold for a total of $70.50. write a system of equations to represent the number of adult tickets,x, and the number of student tickets,y. find the solution and explain what it means. i'll you if you me

Which of the choices shown could be used to prove that aacp=abcp ?

[15 points, algebra 2]simplify the complex fraction and find the restrictions.