Texas Instruments TITANIUM TI-89 User Manual
Page 780
Activities
780
7. Solve
eq2
for
b
to calculate the actual
speed of the boat.
solve(eq2,b)
8. Substitute the known value of
b
into
eq1
,
and solve
eq1
for
a
to determine
a
, the
speed of the eastward traveling current.
solve(eq1,a) | b
The boat travels at a speed of 22.7 knots, and
the water current is approximately 7.9 knots.