Mathematics
Grade10
Easy
Question
A commercial jet flies 1500 miles with the wind. In the same amount of time, it can fly 1000 miles against the wind. The speed of the jet in still air is 550 mph. Write a rational equation to find the speed of the wind.
- 25w2 – 1000 = 0
- 5w – 550 = 0
- w2 – 1000 = 0
- 6w2 – 10w + 500 = 0
Hint:
A rational expression is an expression of the form where Pand Q are nonzero polynomials.
The correct answer is: 5w – 550 = 0
Step 1 of 1:
We have given a commercial jet flies 1500 miles with the wind. In the same amount of time, it can fly 1000 miles against the wind. The speed of the jet in still air is 550 mph.
Let w be the speed of the wind
Speed with wind = 550 + w
Speed against wind = 550 - w
We know that Speed=Distance/Time
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