Question
How many solutions does the system of nonlinear equations graphed below
have?

Look at the number of points where the graphs intersect each other...the points where the graphs of the functions cross each other are the solutions to the system. Upon looking, you should see 4 points where the graphs intersect, so there are 4 solutions to the non-linear system of equations.

since the airplane is moving with constant speed then the distance travelled can be calculated by x=u*t

in km/h would be:

x=640*3.5=2.240 km

in m/s would be:

u=640 km/h= 640.000 m/h =640.000/ 3600 m/s =177.8 m/s

t= 3.5 h= 3.5 * 3600 s=12.600 s

then x=u*t= 177.8*12.600= 2.240.280 m

answer: both chords and diameters have two endpoints on a circle. diameters must intersect the center of a circle.