The fifth term of an arithmetic sequence is 11 and the tenth term is 41. what is the first term

News cameras take an overhead picture of a crowd at an outdoor event journalist then count the total number of people in the picture and use the sample of estimate the total number of people in the crowd this process is an example of

Factor completely. 4p^2 + 36p + 81 express the answer in the form (ap + b)^2

Which ordered pair (c, d) is a solution to the given system of linear equations- c+2d=13 -9c-4d=-15