Answer:
Part a) The speed is 
Part b) After 4 seconds the trains is 24 ft along the track
Part c) 
Step-by-step explanation:
we have

This is the equation of a line in slope intercept form
where
s(t) is the position of a model train in feet
t is the time in seconds
Part a) How fast is the train moving?
The speed of the train is equal to the slope of the linear equation so
The slope m is equal to

therefore
The speed is 
Part b) Where is the train after 4 seconds?
For t=4 sec
substitute the value of t in the equation and solve for s

therefore
After 4 seconds the trains is 24 ft along the track
Part c) When will the train be 29 feet along the track?
For s(t)=29 ft
Substitute the value of s(t) in the equation and solve for t

subtract 14 both sides


Divide by 2.5 both sides

rewrite

Look at your hundred place is 5 you round it up for the 2 to turn into a 3 so your answer would be 363,000.
This can't be graphed. You can't have a slope of 1/x.
Answer:
f(-2) = 14
Step-by-step explanation:
f(x) = 3x^2 - x
f(-2) = 3(-2)^2 - (-2)
= 3(4) + 2
=12 + 2
= 14
The least common multiple is 468.
You can make a list of the multiples...
52: 52, 104... eventually 468
18: 18, 36, eventually 468.
This method is simple and easy. By listing all multiples (I only showed a few just to teach the strategy), you can find the first number that both is a factor of both numbers.
Hope this helps! :)