Please do number 4 !!! Giving Brainlist

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?

Solve the system of equations y= 3/2 - 1, -x+ y =-3

Hardest math question of all time can you solve the equation. check for extraneous solutions.9∣9-8x∣ = 2x+3