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2 years ago

Help please!!!!!!!!!!!

Mathematics

1 answer:

Ivanshal [37]2 years ago

6 0

Answer:

third option and last option are the correct answers

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What is the value of x2 + 4 for x = 5?

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29
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2 years ago

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Several million lottery tickets are sold, and 21% of the tickets are held by men. Suppose you select a random sample of people a

valina [46]

Answer:

hypergeometric

Step-by-step explanation:

For each winning ticket, there are only two possible outcomes. Either it is held by a men, or it is not.

There is a set number of X, and as the number of winning tickets decrease, the probability of a winning ticket being held by a men can decrease or increase. This is a characteristic of the hypergeometric distribution.

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2 years ago

Identify the ellipses, represented by equations, whose eccentricities are less than 0.5

ozzi

Answer:

See explanation

Step-by-step explanation:

Hello, we cannot see the ellipse equations.

The eccentric of an ellipse is given by:

$e = \frac{c}{a}$

Assuming the equations are:

$\frac{ {x}^{2} }{25} + \frac{ {y}^{2} }{16} = 1$

Then a²=25 and b²=16

${c}^{2} = {a}^{2} - {b}^{2}$

${c}^{2} = 25 - 16$

${c}^{2} = {3}^{2}$

$c = 3$

The eccentricity is:

$e = \frac{3}{5} = 0.6$

If the ellipse has equation,

$\frac{ {x}^{2} }{ {5}^{2} } + \frac{ {y}^{2} }{ {3}^{2} } = 1$

then the this time, we have a=5 and b=3.

This means that:

${c}^{2} = {a}^{2} - {b}^{2}$

${c}^{2} = {5}^{2} - {3}^{2}$

${c}^{2} = {4}^{2}$

$c = 4$

$c = \frac{4}{5} = 0.8$

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2 years ago

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Which term is a term in this expression?<br> -3x-7(x+4)

sdas [7]

Answer:

x + 4

Step-by-step explanation:

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2 years ago

When you add two numbers with the same sign, what sign do you use for the sum?

Dafna11 [192]

You keep the same sign. So:-

4 + 4 = 8 and

--4 + -4 = -8

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2 years ago

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