What is 4pi/3 radians in degrees?

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

Which of the following are independent events? a) knowing that it is going to rain tomorrow, and bringing an umbrella to schoolb) knowing that you have to get up early tomorrow, and going to bed before 9 p.mc) knowing that it is going to rain tomorrow, and going to bed before 9 p.md) knowing that you have a test in school tomorrow, and studying thw night before

If cos(θ)=2853 with θin q iv, what is sin(θ)?