Those would be the two roots you got when you solved the quadratic equation.
But remember x is the speed of the slower eastbound plane, so these are two possible values for just that one. You omit the negative answer as it is impossible for speed.
So we have x = 643.93 mi/h
Now, the faster northbound plane goes 50 mi/h faster than that, so its speed is 643.93 + 50 = 693.93 mi/h.
Two planes leave simultaneously from Chicago's O'Hare Airport, one flying due north and the other due east (see figure). The northbound plane is flying 50 miles per hour faster than the eastbound plane. After 3 hours the planes are 2840 miles apart. Find the speed of each plane in mi/h for northbound plane and eastbound plane (eastbound and northbound should be calculated seperated). (Round your answers to the nearest whole number.)
the answer i got for:
eastbound plane: 643.93
northbound plane: -693.93
but when i submit it, the eastbound plane is correct but the northbound plane is wrong
1 answer
2 answers