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sergiy2304 [10]
3 years ago
6

Please help me with this question.

Mathematics
1 answer:
mixas84 [53]3 years ago
7 0

Answer:

B

Step-by-step explanation:

In a triangle, the sum of any two sides must be bigger than the third.

For the first one, 10+20=30 is not greater than 30, so this is not correct.

For B, 122+137 = 259 > 257, 257+137>122  , and 257 + 122 > 137. This works

For C, 8.6 + 2.7 = 11.3 < 12.2, so this does not work

For D, 1/6 + 1/5 = 5/(6*5) + 6/(6*5) = 5/30 + 6/30 = 11/30 < 1/2 = 15/30, so this does not work

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Step-by-step explanation:

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Answer:

a) (1215, 1297)

b) (1174,  1338)

c) (1133, 1379)      

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 1256

Standard Deviation, σ = 41

Empirical Rule:

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a) range of years centered about the mean in which about 68% of the data lies

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68% of data will be found between 1215 years and 1297 years.

b) range of years centered about the mean in which about 95% of the data lies

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95% of data will be found between 1174 years and 1338 years.

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Answer:

continuous.

Step-by-step explanation:

Given function is f(x)=5x^4-9x^3+x-7.

and value of a = 7.

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By definition of continuity, we know that a function is continuous at a given point if both left and right hand limits are equal.

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RHL=\lim_{x\rightarrow 7^+}f(x)=5(7)^4-9(7)^3+(7)-7=8918

Since both limits are equal at a=7 so we can say that given function is continuous at a=7

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