For which of the following equations is x= -5

x+10= -5

Incorrect because it would be 5=-5

(-×)2+50=25

Incorrect, I think this is supposed to be -x squared + 50, if so then it would be 75=25

|2x|=10

Correct because the absolute value of -5 x 2 is 10

x<0

Correct because -5 is less than 0

2x<10

Correct because 2 x -5 is -10 which is less than 10

Hope that helps!

7

step-by-step explanation:

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