Question

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?

Answer 1

k...

Answer 2

d=100

Answer 3

anything?

Answer 4

ahh

Answer 5

60+40/2=50

Answer 6

derp

Answer 7

C.

Answer 8

no

Answer 9

B.

Answer 10

48

Answer 11

nope

Answer 12

that'swrong

Answer 13

it's 48

Answer 14

heck no

Answer 15

oh i mean heck no to 50

Answer 16

average speed is not the average of the speeds

Answer 17

oh man, you are a guru

Answer 18

you are even higher than DA PANIC!!!!!!

Answer 19

Oh, sorry...just been a while since I've done these...

Answer 20

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

Answer 21

2.5+1.666666667

Answer 22

divided by 200

Answer 23

equal 48

Answer 24

that it?

Answer 25

200/4.166666667?

Answer 26

=48

Answer 27

100/60=5/3

Answer 28

100/40=2.5

Answer 29

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

Answer 30

5/2+5/3=15/6+10/6=25/6

Answer 31

200 divided by 25/6=48

Answer 32

ty

Answer 33

you nothing about truth tables, guru?

Answer 34

now redo the problem replacing 100 by \(m\) and see that the answer is still 48 mph

Answer 35

by friend, aripotta needs help with them?

Answer 36

yes, we can do them

Answer 37

go ahead and post

Answer 38

its not me who needs help with them

Answer 39

its aripotta

Answer 40

I'm posting a different problem