Please help! Express the following in the formx + iy

(i)(8 + 6i) + (6 + 4i)
(ii) (9 - 3i) + (- 4 + 5i)
(iii )(2+7i)-(5+3i)
(iv)(5-i)-(6-2i)
(V) 3(4 + 6i) + 9(1 - 2i)
(vi) 3i^ * (7-4i)
( ii)(9+2i)(1+3i)
( viii)(4-i)(3+2i)
(ix)(7+3i) ^ 2
(x)(8 + 6i) (8 - 6i)
(xi)(1+2i)(3-4i)^ (5+6 )
(Xii)(3+2i)^3

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

Which of the following expressions is equal to 2x^2+8

Last year, a state university received 3,560 applications from boys. of those applications, 35 percent were from boys who lived in other states. part a)how many applications did the university receive from boys who lived in other states? part b)applications to the university from boys represented 40percent of all applications. how many applications did the university receive in all? i don't how to do part b so me and plz tell how you got your answer