In this fiqure, PQ = PR = PS and SRT = 68\(^o\). Find QPS 

Find the gradient of the line passing through the points (-2, 0) and (0, -4) 

Find the equation of the line through the points (5, 7) parallel to the line 7x + 5y = 12.

If N225.00 yields N27.00 in x years simple interest at the rate of 4% per annum, find x. 

 Calculate the standard deviation of the following data: 7, 8, 9, 10, 11, 12, 13