Question

if a plane can travel 490 miles per hour with the wind and 450 miles per hour against the wind, find the speed of the plane without a wind and the speed of the wind.

Answer 1

The accurate answer will be 470mi/hour

Answer 2

s=plane's speed
w=windspeed


travels490 mh with wind
450 agains wind



s+w=490mph
s-w=450
add them toegether

s+w=490
s-w=450 +
2s+0w=940

2s=940
divide by 2
s=470
find wind speed
s+w=490
470+w=490
w=20

windspeed=20mph
planespeed=470mph