8x over 8 to the power of 5 = 8 to the power of 7

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 slope of the line? a. -5/2 b.2/5 c. 5/2 d.7/2

Sole the equation 6n + 9 = -3n - 21 - 6 for n