Motion Problems - MathHelp.com - Algebra Help
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- Опубликовано: 21 авг 2024
- For a complete lesson on motion problems, go to www.MathHelp.com - 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson, students learn to solve advanced "motion" word problems -- for example, riding a bike to pick up a car and driving back, or biking part of a trip and taking a boat the rest of the trip. Students should first draw a diagram to represent the relationship between the distances involved in the problem, then set up a chart based on the formula rate times time = distance. The chart is then used to set up the equation.
![Distance Word Problems: WP7 [fbt]](http://i.ytimg.com/vi/N7uLkYd857M/mqdefault.jpg)
![Distance Word Problems: WP7 [fbt]](/img/tr.png)
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Even easier way to think about it:
Gordon covered the same distance while driving as biking, except he went three times faster, which meant that he was biking for three times longer. That means that the time spent biking is the same as the time to take three car trips. If x is the amount of time he spent in the car, then the equation is x + 3x = 8, which obviously simplifies down to 4x = 8, which further simplifies to x = 2. So, he spent 2 hours in the car. If you go 45 miles per hour for 2 hours, you've traveled 90 miles. No distributing or multiplication outside of the elementary school times tables necessary.
Gordon rode his bike 90 miles to get to his car which spent half of his day. Gordon was late to work because he spent 8 hours getting his car. Gordon was then fired for being late. Now Gordon can't afford his car and has to sell it. Gordon could have asked a friend to give him a ride. Don't be like gordon
Remember you can set it up however you want to cause the distance is the same either way.
45x=15(8-x)
This was an excellent video. I figured out how to solve a similar problem when my brother was too busy to help me out.
Pretty good teaching.Understood it better than when my teacher taught me.
Thanks for the education I feel like I'm in heaven though I'm conflicted on the lack of demonstration on the x=6 because I did see someone explain it... keep saving humanity!
Lifesaver !! I get the concept now. Thanks!!
Thank you for this amazing teaching.
wow. gordon has lots of stamina
This comment is a little late... but this is how he got 6:
15x = 45 (8-x)
15x = 45*8 - 45x
15x = 360 - 45x
(add 45x to both sides)
60x = 360
(divide both sides by 60 to get x alone)
x = 360/60
x = 6
thanks
this video helped me so much, btw I'ts 1 month older than me
He got 6 by simply solving algebraically. He did 8-x because that would give you however much hours are left after x. How are you all watching this if you can’t figure out how he got x?
he is solving the problem in his mind x.x
Thank you.
Very helpful! Thank You
he added the two rates together and used the sum of those two to divide it by the total time
yes
He sounds like the pixies from Fairly Odd Parents
He totally does! I am going to picture that from now on!
oMGGG so EASY how did i not understand this
He got 8-x because x is the time it took him to get to his car. And since, the total is 8 hours, (8-x)+x= 8
can someone please explain how he got x=6?
rantz yu Algebra son...
15x = 360 - 45x
60x = 360
x = 360/60
x = 6
excellent my friend..........
"Pssst Margaret, how long did it talk you to walk here this morning?"
"I reckon about five minutes." "Thanks"
"Mrs. Ubert."
"Yes Elton?"
"I used the equation (Ask Margaret how long it took to walk here.) = 5 minutes. My answer is five minutes"
Why does he is teaching in that kind of voice intonation? It makes the students sleepy
Riampageloove is Arun Kumar std to get admission is the power of Indian man to talk and fight agonist will the countries and achieve his desire 5th to get admission is the power of Indian man to talk and fight agonist will the 666th and 6h critic
this helped alot!!
:D
nice
Does it matter if the biking has the x-1 instead of the driving?
No
Man I spent over a hour trying to solve a problem similar to this, thanks, I don't know how I tested high enough for college algebra, i'll be watching a lot more videos just to pass
I Still re play the video over and over and dont see how he got the 6 he didnt even show how he got it.
Same here man.
I still dont get it.
How did he get the 6?
Um question how did he got 8-x
Why/how is 45mph subtracted by 8?
GOT IT!!! :DD
WHY ARE U SO DEPRESSED
can someone explain how did he got 6?
i didnt notice my mouth is OPEN..
still dont get it.. where is 8-x came from?.
Better late than never :D
This dude in the video always misses steps on how he got something. In this he never shows how he got that freaking 6. He always does that in his video
yes he does that a lot.
I like this app math teacher but this guy I really can’t get it I don’t get it when he’s on video . Oh gawd 😭😭😭😭 how and how did he get it how ?!!!!!!
Can I explain me how he got 6 as x
He certainly took the long way at arriving at the answer. Since the distance is the same and since 45 is 3 times 15; then here is how you get the answer. x = number of hours driving. 3x = number of hours biking. It is given that the total number of hours is 8. So, x + 3x = 8. x = 2. He drove for 2 hours at 45 mph. He was 90 miles away. Bingo.
Bruh this is 10 yrs ago
this is baby stuff....i was looking 4 physics problems involving calculus....
lol 3 years ago
@reenadelacruz14 I hate those. . .
How are you going to set up a problem without explaining each part, smh!
Read !
@odd7de7la7robia Can't say anything there, you get that one putts, but you forgot your period at the end of the sentence. Kindergarten stuff.
He looks so depressed
are these advance the questions we answer are 100000... times harder booooo
Algebra is stupid. I understand that if your job required this than it be reasonable to know. BUT WHEN WOULD YOU USE THAT BEING A MARINE BIOLOGIST AND WHO CARES HOW FAR HE BIKED THERE! HE SHOULD HAVE DRIVEN THE BUS! AND COULD YOU JUST ASK HIM HOW FAR IT WAS? Wanna know why people from the 1800's didn't teach algebra? Watch and be amazed.
"Class take a seat" "Yes Mrs. Ubert" "Ok class today we'll learn distance and rates, Elton how far would it take Margret to walk from her house to school?"
nerd