Maths
-|-30-(10-20)|-|5-(10-15)|=?
If someone helped me , I would be grateful

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

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

True or false: the graph of y=f(bx) is a horizontal compression of the graph y=f(x) if b< 1