distance

[ash1121]

My questions says on a trip your are k miles from your destination at 4 pm and y miles from your destination 2 hours later.
How far have you traveled in the two hours?
What was your average speed for the two hours?
would it be 10ky and not sure about the speed?

 

[mmm4444bot]

Did you draw a picture ?

A picture makes it completely obvious that you traveled k-y miles in 2 hours.

:?: Do you know the famous formula that relates the following three numbers?

Distance traveled

Rate of travel

Time elapsed

D = R * T

R = D/T

T = D/R

You have expressions for two of these numbers; you're asked to find an expression for the remaining one.

Please show your work, if you would like more help with this exercise.

MY EDIT: I like Glenn's terminology better, and I added D=RT

 

[BigGlenntheHeavy]

\(\displaystyle 1) \ Distance \ traveled \ in \ two \ hours \ = \ k-y \ miles.\)

\(\displaystyle 2) \ Average \ speed \ in \ those \ 2 \ hours \ = \ \frac{distance \ traveled}{time \ elapsed} \ = \ \frac{k-y}{2}.\)

 

[ash1121]

i tried no I don't know the formula

 

[mmm4444bot]

i tried [to draw a picture]

Good enough. See mine below.

no I don't know the formula

Then just use Glenn's model.

Average speed in miles per hour is: miles/hours

(Double-click image, if needed, to expand)

[attachment=0:3jq3yx45]Average.jpg[/attachment:3jq3yx45]