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sveta [45]
3 years ago
10

Given that mCD=20°, find mBC

Mathematics
1 answer:
frosja888 [35]3 years ago
5 0

Answer:

70°

Step-by-step explanation:

m\widehat {BC} = 90\degree - m\widehat {CD}

m\widehat {BC} = 90\degree -20\degree

m\widehat {BC} = 70\degree

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Write an explicit formula for the recursive formula <br><br> A(n) = A(n - 1) + 3; A(1) = 6
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Answer:

a_{n} = 3n + 3

Step-by-step explanation:

The sequence is arithmetic with explicit formula

a_{n} = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

From the recursive formula

a₁ = 6 and d = 3 [ the constant being added to A(n - 1) ] , then

a_{n} = 6 + 3(n - 1) = 6 + 3n - 3 = 3n + 3

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3 years ago
An ancient Sicilian legend says that the barber in a remote town who can be reached only by traveling a dangerous mountain road
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Answer:

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In explaining this question, I would like us to take into account who the barber is,

" the barber is the one who shaves all those, and those only, who do not shave themselves".

This barber cannot be in existence because who would shave him? If he should shave himself then there is a violation of the rule which says he shaves only those who do not shave themselves. If he shaves himself then he ceases to be a barber. And if he does not shave himself then he happens to be under those who must be shaved by the barber, because of what the rule says. But then he is the barber.

This lead us to a contradiction.

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4 0
4 years ago
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Step-by-step explanation:

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