you can add the different expressions together to get 5x-8

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?

What is the factored form of the following expressions? d^2 – 13d + 36

Solve the inequaliy: (x^2+2)(x−2)^2(6−2x)> 0