Answer:
they are all even numbers except for 155
Step-by-step explanation:
Answer:
5 or 6
Step-by-step explanation:
So I did it in a different way than shown in rsm classes. I said that the speed was x-2 and x.
then I said the distance was 6 and 15. If the time taken was 1 hour more, then we can come up with this equation:
Since the time is 6/x-2 or 15/x
15/x-6/x-2=1
multiply everything to get a common denominator then cancel it out to get
(15x-30)-6x=x^2-2x
11x-30=x^2
x^2-11x+30=0
(x-5)(x-6) is factored form.
so x=5 or x=6. this means that the speed of the boat is either 5km/h or 6 km/h
Answer:
I used the answer the other person gave, but it said it was wrong. Here was the answer I put in the second time.
Step-by-step explanation:
Well, they are equivalent, but I'm not sure if that's exactly what you're asking. :)
1) 3:5
2) 7:10
3) 2:9
4) 6:1
5) 5:2
6) 11:3
7) 9:5
8) 2:7
9) 8:3
10) 5:2
