If f(x) = x^2 + 3x – 2. find f(-2) .f(-2) = -4f(-2) = 4f(-2) = -2f(-2) = 2
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As per the problem
A jet flew for 2 hrs before strong head winds reduced its speed by 40 mph.
It took the plane 5 hrs to travel 1,380 miles
Total time=5 hrs, Time of fly before headwinds,
Time of fly in headwinds
Let the speed before head winds
Then speed in headwinds
As we know that
Hence using this formula and the given data we can write
Hence speed before flying into the headwinds=300mph