Simplify the expression (3+8i) - (4+2i) pls show work!

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 that contains the points (-2,1) and (0,-3)

In angle pqr find the measure of