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2 years ago

Please help asap! I don’t really understand

Mathematics

1 answer:

garri49 [273]2 years ago

7 0

Answer:

x² +3x -8x -24
(x² +3x) +(-8x -24)
x(x +3) -8(x +3)
(x +3)(x -8)

Step-by-step explanation:

This is trying to help you understand a method of factoring trinomials.

The first step is to look at the linear term (-5x) and the constant term (-24) and identify the coefficients and their signs: -5 and -24.

The next step is to identify factors of -24 (the constant) that have a sum equal to -5 (the linear term coefficient). We can look at the ways that -24 can be factored:

-24 = 1(-24) = 2(-12) = 3(-8) = 4(-6)

The sums of these factor pairs are 1-24=-23, 2-12=-10, 3-8=-5, 4-6=-2. Of course, the pair we're looking for is +3 and -8.

The next step from here is to rewrite the linear term using these factors. (-5x=3x-8x) This is the first step of the sequence shown in the figure:

x² +3x -8x -24

The next step is to group these terms in pairs:

(x² +3x) +(-8x -24)

And then, to factor each pair using the distributive property:

x(x +3) -8(x +3)

Finally, finish the factoring, again using the distributive property:

(x +3)(x -8)

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3 years ago

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1.8

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from both sides of the equation.

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Tap for more steps...

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(

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(

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The result can be shown in multiple forms.

Exact Form:

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2 years ago

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Pachacha [2.7K]

Answer:

The amount of money separating the lowest 80% of the amount invested from the highest 20% in a sampling distribution of 10 of the family's real estate holdings is $238,281.57.

Step-by-step explanation:

Let the random variable X represent the amount of money that the family has invested in different real estate properties.

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It is provided that the family has invested in n = 10 different real estate properties.

Then the mean and standard deviation of amount of money that the family has invested in these 10 different real estate properties is:

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Now the lowest 80% of the amount invested can be represented as follows:

$P(\bar X$

The value of z is 0.84.

*Use a z-table.

Compute the value of the mean amount invested as follows:

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