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figure out the total time, and the total distance
divide the total distance by the total time

ok it was easy but i got it wrong
total distance is \(2\times 160=320\)

time going in your new red porche is \(\frac{160}{80}=2\)

how about the time returning?

ugh i don't know cause it comes out as a decimal?

much easier (believe it or not) if you leave it as a fraction

so far so good?

okay so? then do i leave the other as 2? or 160/2?

no use 2

okay then what?

16/3

right
and now speed is distance divided by rate

so your final job is
\[320\div \frac{16}{3}\]

So the average is 60?

that is what i get too

kay good. Thank you!!

you could drive 160 miles or 100 miles or 3,000 miles or \(m\) miles, the average will still be 60

Okay Thank you soo much. =)

yw

try it with \(m\)
you get
\[\frac{2m}{\frac{m}{80}+\frac{m}{48}}=60\] after some algebra