TRIG QUESTION: I will mark Brainliest! Thank you! Please show your work so I can learn and have it in my notes <3

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

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)

In each of the cases that follow, the magnitude of a vector is given along with the counterclockwise angle it makes with the +x axis. use trigonometry to find the x and y components of the vector. also, sketch each vector approximately to scale to see if your calculated answers seem reasonable. (a) 50.0 n at 60.0°, (b) 75 m/ s at 5π/ 6 rad, (c) 254 lb at 325°, (d) 69 km at 1.1π rad.