3x^2-12x-21=0 solve by completing the square

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.

Tom drove 206 miles in 3.9 hours. estimate his average speed.

Micheal is 4 times as old as brandon and is also 27 years older than brandon. how old is micheal