David has scored 81 , 87 , 69 , and 82 on his previous four tests. what score does he need on his next test so that his average (mean) is 82 ?

Asap describe the transformations required to obtain the graph of the function f(x) from the graph of the function g(x). f(x)=-5.8sin x. g(x)=sin x. a: vertical stretch by a factor of 5.8, reflection across y-axis. b: vertical stretch by a factor of 5.8,reflection across x-axis. c: horizontal stretch by a factor of 5.8, reflection across x-axis. d: horizontal stretch by a factor of 5.8 reflection across y-axis.

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Ihave trouble finding the nth term of a linear sequence