given sin (a) = 5/13, pi/2 < a < pi and tan (b) = sqrt 13, pi/2 < B < pi what is tan (a-b)?

Polygons efgh and e′f′g′h′ are shown on the coordinate grid: what set of transformations is performed on efgh to form e′f′g′h′? a. a translation 1 unit to the left followed by a 90-degree counterclockwise rotation about the origin b. a translation 1 unit to the right followed by a 90-degree counterclockwise rotation about the origin c. a 90-degree clockwise rotation about the origin followed by a translation 2 units to the right d. a 90-degree clockwise rotation about the origin followed by a translation 2 units to the left

How do you solving the solution of each system using elimination?

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x