luisz
In the morning, Alan drove 100 miles at the rate of
60 miles per hour; in the afternoon, he drove
another 100 miles at the rate of 40 miles
per hour. What was his average rate of speed,
in miles per hour, for the day?
Delete
Share
This Question is Closed
luisz
Best Response
You've already chosen the best response.
1
k...
luisz
Best Response
You've already chosen the best response.
1
d=100
luisz
Best Response
You've already chosen the best response.
1
anything?
luisz
Best Response
You've already chosen the best response.
1
ahh
luisz
Best Response
You've already chosen the best response.
1
60+40/2=50
luisz
Best Response
You've already chosen the best response.
1
derp
luisz
Best Response
You've already chosen the best response.
1
C.
luisz
Best Response
You've already chosen the best response.
1
no
luisz
Best Response
You've already chosen the best response.
1
B.
luisz
Best Response
You've already chosen the best response.
1
48
luisz
Best Response
You've already chosen the best response.
1
nope
luisz
Best Response
You've already chosen the best response.
1
that'swrong
luisz
Best Response
You've already chosen the best response.
1
it's 48
anonymous
Best Response
You've already chosen the best response.
0
heck no
anonymous
Best Response
You've already chosen the best response.
0
oh i mean heck no to 50
anonymous
Best Response
You've already chosen the best response.
0
average speed is not the average of the speeds
luisz
Best Response
You've already chosen the best response.
1
oh man, you are a guru
luisz
Best Response
You've already chosen the best response.
1
you are even higher than DA PANIC!!!!!!
Calcmathlete
Best Response
You've already chosen the best response.
0
Oh, sorry...just been a while since I've done these...
anonymous
Best Response
You've already chosen the best response.
0
figure out how long it took to get there, then figure out how long it took to get back
that is the total time
divide the total distance (200 miles ) by the total time to get the average speed
luisz
Best Response
You've already chosen the best response.
1
2.5+1.666666667
luisz
Best Response
You've already chosen the best response.
1
divided by 200
luisz
Best Response
You've already chosen the best response.
1
equal 48
luisz
Best Response
You've already chosen the best response.
1
that it?
luisz
Best Response
You've already chosen the best response.
1
200/4.166666667?
luisz
Best Response
You've already chosen the best response.
1
=48
luisz
Best Response
You've already chosen the best response.
1
100/60=5/3
luisz
Best Response
You've already chosen the best response.
1
100/40=2.5
anonymous
Best Response
You've already chosen the best response.
0
time going it \(\frac{100}{60}\) time returning is \(\frac{100}{40}\) total time is
\[\frac{100}{60}+\frac{100}{40}=\frac{25}{6}\] and
\[200\div \frac{25}{6}=200\times \frac{6}{25}=8\times 6=48\] as luisz said
luisz
Best Response
You've already chosen the best response.
1
5/2+5/3=15/6+10/6=25/6
luisz
Best Response
You've already chosen the best response.
1
200 divided by 25/6=48
luisz
Best Response
You've already chosen the best response.
1
ty
luisz
Best Response
You've already chosen the best response.
1
you nothing about truth tables, guru?
anonymous
Best Response
You've already chosen the best response.
0
now redo the problem replacing 100 by \(m\) and see that the answer is still 48 mph
luisz
Best Response
You've already chosen the best response.
1
by friend, aripotta needs help with them?
anonymous
Best Response
You've already chosen the best response.
0
yes, we can do them
anonymous
Best Response
You've already chosen the best response.
0
go ahead and post
luisz
Best Response
You've already chosen the best response.
1
its not me who needs help with them
luisz
Best Response
You've already chosen the best response.
1
its aripotta
luisz
Best Response
You've already chosen the best response.
1
I'm posting a different problem