Answer:
Love u man :) can i get crown please
Step-by-step explanation:
you begin with fifteen items and want to know how many groups you can make with three items in each group. The answer, or quotient, is the number of groups. 3 = 5. The number that is divided is called the dividend and the number which the dividend is being divided by is the divisor.
If you factor 3y from each of these, you should get (8x^2) and (5y). These are completely simplified.
Your greatest common factor is 3y
Let's define variables:
s = original speed
s + 12 = faster speed
The time for the half of the route is:
60 / s
The time for the second half of the route is:
60 / (s + 12)
The equation for the time of the trip is:
60 / s + 60 / (s + 12) + 1/6 = 120 / s
Where,
1/6: held up for 10 minutes (in hours).
Rewriting the equation we have:
6s (60) + s (s + 12) = 60 * 6 (s + 12)
360s + s ^ 2 + 12s = 360s + 4320
s ^ 2 + 12s = 4320
s ^ 2 + 12s - 4320 = 0
We factor the equation:
(s + 72) (s-60) = 0
We take the positive root so that the problem makes physical sense.
s = 60 Km / h
Answer:
The original speed of the train before it was held up is:
s = 60 Km / h
