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PLEASE EXPLAIN EVERY STEP OF YOUR ANSWER CLEARLY!

15. 0=x^2-2x-24
A. x=-6,4
B. x=-6,-4
C. x=6,-4
D. x=6,-4

X=6,-4

Step-by-step explanation:

0=x^2-2x-24

First substitute x with 6

0=(6)^2-2(6)-24

36-12-24

=0

Now try -4

0=(-4)^2-2(-4)-24

Two negative numbers time each other turns it into a positive number -4 x -4=16

24-24=0

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

what