Verify that (-4, 12) is the solution to the system. show work to justify your answer
( show your work)

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

The diagram shows corresponding lengths in two similar figures. find the area of the smaller figure. a. 14.4 yd2 b. 24 yd2 c. 26.4 yd2 d. 28