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3 years ago

Hurry help I don't understand

Mathematics

2 answers:

SIZIF [17.4K]3 years ago

7 0

By sine law
sin45/16.5= sinB'/22
sinB'= sqrt2/2/16.5*22=
B'= 70.5
B=180-70.5=109.5

densk [106]3 years ago

5 0

Sin(A) / a = sin(B') / b'
where a is the side opposite to the angle A and B is the side opposite to the angle B'. So

sin(45)/16.5 = sin(B')/22
B' = 70.53

However, notice that B' in your triangle is an obtuse angle, so you also need to know the property of sine

sin(B') = sin(180 - B')
So another B' that can work is:
sin(70.53) = sin(180 - 70.53)
sin(70.53) = sin(109.47)
So B' = 109.47.
It seems that the closest one in your answer is 109.95 so I think out of elimination, B is your answer.

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3 years ago

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Step-by-step explanation:

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2 years ago

What 5 numbers that has a median equal to 7?

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3 years ago

A random sample of 28 statistics tutorials was selected from the past 5 years and the percentage of students absent from each on

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Step-by-step explanation:

Hello!

X: number of absences per tutorial per student over the past 5 years(percentage)

X≈N(μ;σ²)

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The formula for the CI is:

X[bar] ± $Z_{1-\alpha /2}$ * $\frac{S}{\sqrt{n} }$

⇒ The population standard deviation is unknown and since the distribution is approximate, I'll use the estimation of the standard deviation in place of the population parameter.

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[9.26; 11.56]

Using a confidence level of 90% you'd expect that the interval [9.26; 11.56]% contains the value of the population mean of the percentage of absences per tutorial of the students over the past 5 years.

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3 years ago

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Anestetic [448]

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<span>f(-11/5) = -5
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3 years ago