Respuesta :

garydesir1
Hello there!

You need to use the correct formula for that:

Average speed = total distance/ total time needed

Average speed = (54 + 85)/(1 + 3)

Average speed = 139/4

Average speed = 34.75 kilometers per hour


As always, it is my pleasure to help students like you!
Kaikerscupcake
Hey there! :D

So, we need to find how many miles would be traveled per hour in the 85 miles in 3 hours time frame. 

85/3= 28 1/3

So, we could represent this like a sequence of numbers and find the mean. (which is just the average) 

[tex]54, 28 \frac{1}{3}, 28 \frac{1}{3}, 28 \frac{1}{3} [/tex]

Add all the numbers together. 

[tex]= 139 [/tex]

Since this was in a span of four hours. 1+3=4, we can divide this by 4 to find the average. 

[tex]139/4= 34.75[/tex]

The average was 34.75 miles per hour. 

I hope this helps!
~kaikers

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