An airplane makes a 2,748-mile flight in 6 hours. What is the airplane's average rate of speed in miles per hour?
2 answers:
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See, pls, the following:
<u>WAY №1</u> (based on properties of lines)
1) it is possible to find out an equation for line 'k' using its points (common equation for line is y=ax+b):
this means, for line 'k' y=5x+21
2) for line 'h' (the same operations):
equation for line 'h' is y=5x-5
The parameter 'a' for the both lines is the same, it means k║h.
<u>WAY №2.</u> (based on properties of vectors):
1) find points for vector 'k': (1--7;26--14) ⇒ (8;40).
2) to do the same for vector 'h': (4--4;15--25) ⇒ (8;40).
3) using the found points for the both vectors to compare them:
1=1 it means the both lines are parallel.
<u>WAY №1</u> (based on properties of lines)
1) it is possible to find out an equation for line 'k' using its points (common equation for line is y=ax+b):
this means, for line 'k' y=5x+21
2) for line 'h' (the same operations):
equation for line 'h' is y=5x-5
The parameter 'a' for the both lines is the same, it means k║h.
<u>WAY №2.</u> (based on properties of vectors):
1) find points for vector 'k': (1--7;26--14) ⇒ (8;40).
2) to do the same for vector 'h': (4--4;15--25) ⇒ (8;40).
3) using the found points for the both vectors to compare them:
1=1 it means the both lines are parallel.