Angie was given the system of equations. Angie's work is shown in the table. 7x +y = - 12 7x + 4y = -6 Steps 1 Angie's Work --1 (77 + y = -12) -70 -76 = y = 12 72 + 4y = -6 Y = 12 2 3y = 6 Y = 2 -7 (2) - y = 12 -14 - y = 12 3 -Y = 26 Y = -26 4 The solution is (-2,2) Where did Angie make an error? Justify your answer.​

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

the battle of gettysburg is considered the "high water mark" of the confederacy because it marked the greatest advance of the confederate forces against the union.