let L be <span>Lissette's age
and F </span><span>Francesca age
2 F - 3 = 13
2F= 16
F = 16/2 =8
</span>
The "rate" at which something travels can be referred to as velocity.
V = displacement / time
So going with the wind, Vp + Vw = 1800 / 3.6 = 500 mph
Going against the wind, Vp - Vw = 1800 / 4 = 450 mph
Vp = 500 - Vw
Vp = 450 + Vw
500 - Vw = 450 +Vw
2Vw = 50
Vw = 25 mph
Vp = 475 mph
16, 24, 32
and it goes on, and on.