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MatroZZZ [7]
3 years ago
9

Jeffrey is biking through the mountains. He bikes for six hours every day. When he started his ride one day the temperature was

55° F. By the middle of his ride the temperature had risen 13° and then by the time he finished riding for the day the temperature had fallen 21°. What was the temperature when he finished his ride? A) 34° F B) 47° F C) 63° F D) 68° F
Mathematics
1 answer:
Mashcka [7]3 years ago
6 0

Answer:

47

Step-by-step explanation:

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Answer:

Step-by-step explanation:

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Let the exterior angle be represented by x^{o}, and the three interior angles of the triangle be represented by a^{o}, b^{o} and c^{o}.

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Thus,

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⇒ a^{o}  = x^{o} - b^{o}

Also,

b^{o}  = x^{o} - a^{o}

But,

a^{o} + b^{o} + c^{o} = 180^{o}   (sum of angles in a triangle)

⇒ c^{o} = 180^{o} - (a^{o} +  b^{o})

and

a^{o} + b^{o} = 180^{o} - c^{o}

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a^{o} = 180^{o} - (b^{o} + c^{o})

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a^{o} +  b^{o} = x^{o}

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Answer:

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