Posted by tiger on Monday, November 18, 2013 at 11:52pm.
harry drove for 4 hours on the freeway , he decreased his speed by 20 mph than drove for 5 hours on the country road. If his total trip was 449 miles, than what was his speed on the freeway

math  Steve, Tuesday, November 19, 2013 at 12:02am
distance = speed * time, so if his freeway speed was s, then
4s + 5(s20) = 449

math  Kuai, Tuesday, November 19, 2013 at 12:06am
Freeway speed
Country road speed
4r + 5(r20) =449
4r +5r 100 =449
9r = 549
r = 61
Freeway 61 mph

math  James, Tuesday, March 29, 2016 at 5:55pm
Harry drove for 3 hours on the freeway, then decreased his speed by 20 miles per hour and drove for 6 more hours on a county road. If his total trip was 330 miles, than what was his speed on the freeway?
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