Need ! will gave brainliest! create a system of linear equations that when solved algebraically, prove to have no solution algebraically.

Sounds like 2 parallel lines.

Consider

2x-3y = 5

and

2x-3y = 7

These lines have the same slope and are thus parallel. Parallel lines never intersect. So there is no algebraic or graphical solution.

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We'll set up the first two equations so z=1 and the last so it doesn't, no solutions.

x + y + z = 1

x + y + 2z = 2

z = 0

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