25 probability question.

this is from math-a-thon, pls solve this problem to me children with

destructimous has 7 sonic blasts and 13 heat rays. it also has a 2/7 chance of using its ultra power blast. luckily, octagon’s sheild reflected that blast and stopped all the robots. how many ultra power bots did destructimous have? pls show/ explain your work. (i know the answer i just dont know how to find it).

Step-by-step explanation:

is there more to the question?

x + 107

step-by-step explanation:

let's say that the number he had before the mistake was x. then, he will have 107 dollars more than this, so the answer is x + 107.

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