How are the coordinates of the new point found if it is rotated 90á counterclockwise? how many degrees is that equivalent to if the rotation is clockwise?
how are the coordinates of the new point found if it is rotated 180á counterclockwise? how many degrees is that equivalent to if the rotation is clockwise?

The new coordinates of new point if it is rotated by 90 degree counterclockwise by adding pi/2 to the coordinate. It is equivalent to 270 degree if it is rotated clockwise direction. The new coordinates of new point if it is rotated by 180 degree counterclockwise by adding pi to the coordinate. It is equivalent to 180 degree if it is rotated clockwise direction.

x > 1.3

step by step:

8.5−0.9x> 9.8−1.9x

step 1: simplify both sides of the inequality.

−0.9x+8.5> −1.9x+9.8

step 2: add 1.9x to both sides.

−0.9x+8.5+1.9x> −1.9x+9.8+1.9x

1x+8.5> 9.8

step 3: subtract 8.5 from both sides.

1x+8.5−8.5> 9.8−8.5

1x> 1.3

step 4: divide both sides by 1.

1x/1 > 1.3/1

it is 10.6 according to my calculations