Select all of the equations that have no real solution. a 5x - 1 - 2x = 3x - 7 b 6x - (x - 2) = 5x - 2 c -3(5x + 3) = -15x - 9 d 10x + 4 + x = 4 + 11x - 1

All the equations have no real and evident solutions

Step-by-step explanation:

(a) 5x -1 -2x = 3x -7

Collect like terms

5x - 2x - 3x = -7 -1

5x - 5x = -8

x = -8/0

x = <> no solution

(b) 6x - (x- 2) = 5x -2

6x - x +2 = 5x -2

Gather like terms

5x - 5x = -2 -2

0x = -4

x = -4/0

x = <> no solution

(c). -3(5x +3) = -15x -9

-3 x 5x - 3 x 3 = -15x - 9

-15x - 9 = -15x -9

Collect like term

-15x +15x = -9 +9

0 = 0

Therefore no real solutions.

(d). 10x + 4 + x = 4 + 11x -1

Collect like terms

11x - 11x = 3 - 4

0x = -1

x = -1/0

x = <> no real solution.

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: c i think

step-by-step explanation: