Kendra was given this system of equations -3x+7y=-15 -2x-7y=5 kendra's work is shown in the table. where, if anywhere, did kendra first make a mistake?

5   1/4   miles per hour

step-by-step explanation:

15   3/4 / 3 = 5   1/4

.632

step-by-step explanation:

6 * 1/10 = 3/5

3*0.01 = 0.03

3/5 + 0.03 = .63

2*0.002 = .002

.63 + 0.002 = .632

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

it would open into a square depending on the type of envelope i’m not sure about the second part