anonymous
  • anonymous
You drive a car 2.0 km to the gas station, 4.0 km to the shopping mall to let your mother off, and 4.5 km back home. The trip takes 20.0 min. What is your average speed? 3.2 m/s 4.38 m/s 8.75 m/s 0.525 m/s
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
@Learner11
anonymous
  • anonymous
@Nnesha
anonymous
  • anonymous
@phi

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More answers

sophiaholder
  • sophiaholder
OKay so, S = distance/time
sophiaholder
  • sophiaholder
So, you would want to add up how many kilometers you traveled first.
anonymous
  • anonymous
that would be 10.5/20.00 right?
sophiaholder
  • sophiaholder
Nope. If we are trying to find miles/seconds we need to convert them
DanJS
  • DanJS
= ....
anonymous
  • anonymous
oh
DanJS
  • DanJS
Do you remember calculating the 'average rate of change' given two points on a graph from algebra
DanJS
  • DanJS
slope of a secant line connecting the two points on the graph...
sophiaholder
  • sophiaholder
Dan can probably explain this better than me, so I leave this one to him
anonymous
  • anonymous
I have no Idea what your talking about my brain just died
DanJS
  • DanJS
It is the same as that, except it is a graph of (Total distance traveled) vs (total time traveled) for the y and x axis
DanJS
  • DanJS
To get the average speed - you take the initial value point (0 min, 0 km) and the final point (20 min , (4.5+2.0+4.0) km ) and calculate the slope of the line through those
DanJS
  • DanJS
In short, the average speed on an interval will be the ratio of the total distance traveled over the total time traveled
anonymous
  • anonymous
@dan815
DanJS
  • DanJS
\[ave~speed = \frac{ distance ~traveled }{ time of traveling }\]
DanJS
  • DanJS
you will get km/min need to convert to m/s
anonymous
  • anonymous
O.o
dan815
  • dan815
http://prntscr.com/8kh2ht
dan815
  • dan815
convert it into meters/second
anonymous
  • anonymous
I DON'T UNDERSTAND x-x
DanJS
  • DanJS
\[\frac{ X~km }{ 1~\min }*\frac{ 10^3~m }{ 1~km }*\frac{ 1~\min }{ 60~s } = \frac{ X * 10^3 }{ 60 }*\frac{ m }{ s }\]
anonymous
  • anonymous
omg
dan815
  • dan815
okay do you get that speed = d/t
anonymous
  • anonymous
distance divided by time?
dan815
  • dan815
yes speed tells you the rate of distance change over time
dan815
  • dan815
you saw that 10.5 km traveled in 20 mins right
dan815
  • dan815
tell me if that part is clear or not, gotta know this to move on
dan815
  • dan815
10.5 = 2+4+4.5
anonymous
  • anonymous
Everything

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