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(s-20) = 449

- math -
**Kuai**, Tuesday, November 19, 2013 at 12:06am
Freeway speed

Country road speed

4r + 5(r-20) =449

4r +5r -100 =449

9r = 549

r = 61

Freeway 61 mph

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