An aircraft travels 1400 km at a speed of 700 km/h
and then runs into a headwind that reduces its speed
over the ground to 500 km/h for the next 800 km.
what is the total time for the flight? what is the
average speed?

Total time of flight= 3.6 hours

Speed of flight= 611.1 Km/h

Explanation:

Time taken when moving at 700 Km/h

Since speed=distance/time then time=distance/speed=1400 Km/700 km/h=2 hours

Time taken when moving at a speed of 500 Km/h

Time=800 km/500 Km/h=1.6 hours

Total time taken=2 hours+ 1.6 hours=3.6 hours

Total distance covered= 1400 Km+ 800 Km=2200 Km

Average speed=distance/total time taken=2200 km/3.6 hours=611.1 Km/h

Therefore, average speed is 611.1 Km/h

answer

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explanation:

because it says use -2,0,and 2 for x, we can plug those numbers into the equation. y/4=3/4(-2)+2   y/4= -1 1/2 +2 now to get x by itself, we can multiply each side by 4. y=-6+8 which equals y=2 when x=-2. now you can do the same thing with 0 and 2 as x. you get y=8 when x=0 and y=14 when x=2.

x   |   y

-2 |   2

0   |   8

2   |   14