Answer:
see explain
Step-by-step explanation:
3 - 5
(X1, Y1) (X2, Y2)
which turns to at least for number 3
(11 - 8) / (-2 - 6) = -3 / 8 = -0.375
think you can figure out the rest.
then for #1 and 2
do the same thing, except choose any two points on the graphs.
for example you could choose (-1, 0) and (0, -2) for #1
in the equation this would be (-2 - 0) / (0 - (-1) = (-2)/1 = -2
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
For 16 it's 8/10 for 17 it's 52/100 for 18 it's -92/100 for 19 it's -48/100 for 20 it's 86/100 for 21 it's 76/100
Answer:
#1=24 #2=36 #3=77 #4=21
Step-by-step explanation:
Hope this helps
Answer:
9
Step-by-step explanation:
If you want to get $15 profit, You will need to paint 9 faces. You spent $12 on painting supplies so this is the explanation.
$3 x 9 = $27
$-12 + $27 = $15
That way, you earn $15.
