What is the solution to this system of equations?
x=12-y
2x +3y=29

Step-by-step explanation:

just adding +y on both sides of 1st equation

x+y = 12

now multiplying the whole 1st equation with 2

2x+2y=24

now subtract the equation 1 from equation 2

2x+3y = 29

2x+2y = 24

y = 5

use value of y in any equation

x+5 = 12

x = 7

y = 5

the above values satisfy both equations.

i hope this helps

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m

answer: idk wbu

step-by-step explanation: umm..