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3 years ago

Help me please it’s due today :/

Mathematics

1 answer:

jeyben [28]3 years ago

6 0

Answer:

68 degrees

Step-by-step explanation:

This triangle is an isosceles triangle which means that two sides have equal lengths and when two sides have equal lengths that means that two angles are the same. so you add 56 and 56 together and you get a sum of 112. all triangles add up to a degree of 180, so you therefore subtract 112 from 180 which gives you an answer of 68 degrees , therefore x is 68

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3 years ago

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An hour befor show time,only 155 people are seated for rockfest.According to ticket sales 95% of the people have yet to arrive

Ludmilka [50]

Question:

An hour before show time, only 155 people are seated for rockfest. According to the ticket sales, 95% of the people have yet to arrive. How many tickets were sold?

Answer:

3100 tickets

Step-by-step explanation:

Given

$p = 95\%$ --- Yet to arrive

$Seated = 155$

Required

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If 95% are yet to arrive, then 5% have arrived (i.e. 100% - 95%)

So, the total number of people is calculated as:

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3 years ago

Suppose that X ∼ N(−7, 14). Find the value of x for which P(|X + 7| ≤ x) = 0.44

grigory [225]

$\mathbb P(|X+7|\le x)=\mathbb P\left(\left|\dfrac{X+7}{14}\right|\le\dfrac x{14}\right)$
$=\mathbb P\left(|Z|\le\dfrac x{14}\right)=0.44$
$\implies\mathbb P\left(-7\le Z\le\dfrac x{14}\right)=0.22$
$\implies\mathbb P\left(Z\le\dfrac x{14}\right)=0.5+0.22=0.72$

$\implies\dfrac x{14}\approx0.5828$
$\implies x\approx8.1598$

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3 years ago