4 years ago

Which pair of angles are supplementary?

Mathematics

2 answers:

mr Goodwill [35]4 years ago

7 0

Answer:

the choices are:

A: angles 2&3

the rest are vertical angles

djyliett [7]4 years ago

6 0

Answer:

Step-by-step explanation:

2 and 3 are supplementary to each other and add up to 180 degrees

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4 years ago

A manufacturer knows that their items have a normally distributed lifespan, with a mean of 15 years, and standard deviation of 3

Gala2k [10]

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The probability that their mean life will be longer than 13 years = .9943 or 99.43%

Step-by-step explanation:

Given -

Mean $(\nu )$ = 15 years

Standard deviation $(\sigma )$ = 3.7 years

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the probability that their mean life will be longer than 13 years =

$P(\overline{X}> 13)$ = $P(\frac{\overline{X} - \nu }{\frac{\sigma }{\sqrt{n}}}> \frac{13 - 15 }{\frac{3.7}{\sqrt{22}}})$ $(Z =\frac{\overline{X} - \nu }{\frac{\sigma }{\sqrt{n}}})$

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3 years ago