The perimeter of a rectangle is 34 it's width is 6.5. write and equation to determine the length

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.

How do you use the elimination method for this question? explain, because i really want to understand!

How do i find the missing angle measure in a polygon