The two triangles are similar. find x showing the proportion and all work.

We need to write a proportion.

6/2 = (x+2)/x

3 = x² +2x

x² + 2x - 3 =0

(x + 3)(x - 1) = 0

x= -3, x= 1

Because we need to find length x, a length cannot be negative.

So, x = 1.

b is the answer that makes most sense

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