1) In an arithmetics progression, the sum of the first in terms is given by Sn = (9n - 3n²)/2. Find the sum of terms from
the 6th term to the 18th term. (4marks)
2) It is given that 6, 18 h and k are the four terms of a
geometric progression. Find the value of k. (2 marks)

Shania's test scores in 8 subjects were 88, 91, 85, 74, 69, 72, 80, and 87. shania found the middle number of her scores. which type of measure did she find?

The table below shows the height of a ball  x  seconds after being kicked.  what values, rounded to the nearest whole number, complete the quadratic regression equation that models the data? f(x)  =  x2  +  x  +  0based on the regression equation and rounded to the nearest whole number, what is the estimated height after 0.25 seconds?   feet

Point s lies between points r and t on . if rt is 10 centimeters long, what is st? 2 centimeters 4 centimeters 6 centimeters 8 centimeters