There are 2 brown marbles, 3 black marbles, and 4 gold marbles in a bag. What is the probability of drawing 2 brown marbles if t
1 answer:
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For this case, we have to define perpendicular lines:
We have then:
Then, according to the definition we have:
We observe that the definition is fulfilled, therefore, the lines are perpendicular.
Answer:
b. they are perpendicular