help with what? be sure to put everything you need to say into a question
Answer:
Answer is 12 isnt it
Step-by-step explanation:
12×4=48
48+9=57
it would take them 5 hours and 70 seconds
Check the picture below
notice, using the 30-60-90 rule, since that triangle is a 30-60-90 triangle, we get 11 = 2x