Problema Solution
A plane flying with a tailwind flew at a speed of 430 mph, relative to the
ground. When flying against the tailwind, it flew at a speed of 340 mph.
Graph the system to find the speed of the plane in calm air and the
speed of the tailwind.
Answer provided by our tutors
v+V =430mph
v-V = 340
solving two eqns,point of intersection of two lines on graph
2v = 770
v(plane) = 385mph
V(tailwind) = 430 - 385 = 45 mph