Homework Help: MATH

Posted by Anonymous on Wednesday, January 5, 2011 at 6:49pm.

Aircraft are landing and taking off on parallel runways at a busy airport. On its approach, one aircraft descends from an altitude of 1200m to an altitude of 500m in 35s. During the same time, a departing aircraft climbs from an altitude of 200 m to an altitudes of 1250m.

A) Write a system of linear equations to model the altitudes of the aircraft

B)When are the aircraft at the same altitude? What is that altitude?

I really dont get how to to this, Please help:(

MATH - Damon, Wednesday, January 5, 2011 at 6:55pm
1200-500 = 700
so
x = 1200 - (700/35)t

1250 - 200 = 1050
so
y = 200 +(1050/35) t

when does x equal y ?

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