Solve each system of equations 3x+4y-6z=-60 7x-5y+z=-37 2x+3y-z=-29 i got -8, -3,4

(− 8 ,  − 3 , 4 )  

Step-by-step explanation:

(I used substitution)

To solve, first solve for the first variable in one of the equations, then substitute the result into the other equation.

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