What is 1.2x=6? and can you show me the work?

Which expression is equivalent to (9x - 3 1/ + 1 3/8)

The amount of energy it takes to lift a box might be a function of which of the following

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?