Answer:
B. x = 5/2
Step-by-step explanation:
quadratic formula is:
(
±
)/2a
when
+ bx + c = 0
in this equation, a = 1, b = -5, c = 25/4
plug those into the equation and simplify to get x=5/2
(because b^2-4ac in this case is equal to 0, there is only one answer)
By definition we have to:
v = d / t
Where,
v: speed
d: distance
t: time
The time in hours is given by:
t = 4 + (45/60)
t = 4.75 hours
Substituting values we have:
v = 456 / 4.75
v = 96 km / h
Answer:
the speed of the train is:
v = 96 km / h
Answer:
4
Step-by-step explanation:

{L'Hospital's rule}
<em>I hope this helps you</em>
<em>:)</em>