you are making a trip of 200 miles.( Maybe on a bicycle, maybe in a car, maybe on an airplane.)
A. how long does i t take you to get there if u travel at 60 miles per hour?
B. how long does it take you to get there is you travel at 400 miles per hour.
C. write an equation that will tell u how long it takes you to get there at x miles per hour.
D. draw a graph of the time it takes (y) as a function of our speed(x)...
please if u have the answer please explain it to me...please....
2006-09-04 03:46:01 · 8 answers · asked by jouliette 1 in Education & Reference ➔ Homework Help
A. You have 200 miles and you travel 60 miles per hour...therefore 200/60= 3.33hours= 3 hours 20 minutes approximately
B. You have 200 miles to travel and you travel at 400 miles per hour...therefore 200/400= 0.5 hours or 30 minutes
C. You have 200 miles to travel and you travel at x miles per hour...let x be the speed and y be the time...then y = 200/x
D. It is a linear graph...i can't draw it here but here is a tip...try out some values of x and y in the above equation to get points and then join the points!
2006-09-04 03:59:17 · answer #1 · answered by Anonymous · 0⤊ 0⤋
In all the above questions, we make use of the simple relation that:
SPEED = DISTANCE/TIME
Keep in mind that the units of speed is miles per hour i.e distance per time, and i'm sure you will never forget the above relation.
A. Speed = 60 mph
Distance = 200 miles
Time = ?
As discussed above, speed = distance/time, therefore, on
cross multiplying, we get time = distance/speed. Therefore,
Time required = 200/60 = 3.33 hours or appx 200 minutes
B. As in the above case, if we travel at 400 mph, time required
will be = 200/400 = 0.5 hours or 30 minutes
C. Once again, we make use of the basic formula that speed
= distance/time.
In this case we have, Distance = 200 miles, Speed = x mph
Time = ?
By now, you know that time = distance/speed, therefore,
time = 200/x hours is the required equation. If you look at
the above 2 cases, you would realise that we have been
making use of the same equation all along, except that in
case A, the value of x was 60 & in case B it was 200
D. To plot the graph between time and speed, you need to first
develop a relation between the two, which is not a difficult
task at all if you once again consider the basic relation we
have of speed = distance/time. This is now modified as-
x = distance/y, but as distance = 200 miles(given),
x = 200/y. Now assume different values of y(you can use the
ones from the above cases) to get corresponding values of x
Plotting the graph should not be difficult now...
2006-09-04 11:13:44 · answer #2 · answered by Anirudh 2 · 0⤊ 0⤋
It is simple unit conversions.
a. 200miles/60mph= 3hr20min or 3.33hrs or 3 1/3hrs
b. 200miles/400mph= 30min or .5 hrs or 1/2 hrs
c distance/speed= time
ex. 200/x=y
d unfortunately I can't draw a graph on this...
As long as the units are the same, you can just divide the distance by speed to get the time.
2006-09-04 10:53:03 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Just divide the trip length by miles per hour and you get how many hours it takes
2006-09-04 10:48:53 · answer #4 · answered by dwh12345 5 · 0⤊ 0⤋
200/60=ans for A
200/400=ans for B
200/x=ans for C
2006-09-04 10:51:53 · answer #5 · answered by muhuehue 4 · 0⤊ 0⤋
d is distance (miles)
r is rate (miles per hour)
y is time in hours
d = r times t
so for your graph t becomes y
and r becomes x
2006-09-04 10:54:45 · answer #6 · answered by doc2be 4 · 0⤊ 0⤋
What you need is the formula: speed = distance/time. You can figure it out with that
2006-09-04 10:52:11 · answer #7 · answered by Dan 4 · 0⤊ 0⤋
Sorry but I'm only entering fifth grade
2006-09-04 10:52:06 · answer #8 · answered by Pinay 3 · 0⤊ 0⤋