9+ 5 = x - 11how to find the x number

Find the total area for the regular pyramid ( follow the answer set up in the picture)

What is the value of x in the equation 6(x + 1) – 5x = 8 + 2(x – 1)?

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