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3 years ago

Why is it difficult to find the correct factors for a trinomial using The FOIL method?

Mathematics

1 answer:

Gemiola [76]3 years ago

3 0

Answer:

FOIL is not used to factor but to apply the distributive property.

Step-by-step explanation:

The FOIL method is used to apply the distributive property not factoring.

It is used to perform operations like (x-2)(x+6). FOIL stands for first, outer, inner, and last for the order of multiplying each of the four terms with the other terms.

$(x-2)(x+6)=x^2+6x-2x-12$

This is FOIL. Then we simplify to $x^2+4x-12$

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Write the numbers in the domain with commas between them (for example, {1, 2, 3}

zlopas [31]

Answer:

{-5, -1, 2}

Step-by-step explanation:

domain is the inputs or x numbers

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3 years ago

What is the simplified form of the quantity of x plus 4, all over the quantity of 7 − the quantity of x plus 3, all over the qua

scoundrel [369]

$\frac{x + 4}{7} -\frac{x + 3}{x + 5} =\frac{(x + 4)(x + 5)}{7(x + 5)} -\frac{7(x + 3)}{7(x + 5)} =\frac{x(x + 5) + 4(x + 5)}{7(x) + 7(5)} - \frac{7(x) + 7(3)}{7(x) + 7(5)} =\frac{x(x) + x(5) + 4(x) + 4(5)}{7x + 35} - \frac{7x + 21}{7x + 35} =\frac{x^{2} + 5x + 4x + 20}{7x + 35} -\frac{7x + 21}{7x + 35} =\frac{x^{2} + 9x + 20}{7x + 35} - \frac{7x + 21}{7x + 35} =\frac{(x^{2} + 9x + 20) - (7x + 21)}{7x + 35} =\frac{x^{2} + (9x - 7x) + (20 - 21)}{7x + 35} =\frac{x^{2} + 2x -1}{7x + 35}$

3 0

3 years ago

Which of the following descriptions best models a door?

Dahasolnce [82]

Answer:

Step-by-step explanation:

a door is a rectangle so is can't be any of the other shapes

7 0

3 years ago

Thirty three different video games showing violence were observed. The duration times of violence (in seconds) were recorded. W

AlladinOne [14]

Answer:

The "df" stands for "degrees of freedom", and represents the number of independent observations in a set of data.

Its value in this case is df=32.

Step-by-step explanation:

The sample is of size n=33.

As we do not know the population's standard deviation, we use as estimate the sample's standard deviation. Because of this, we use the t-statistic in place of the z-value.

The "df" stands for "degrees of freedom", and represents the number of independent observations in a set of data (the data in this case is the sample of 33 video games).

In one-sample tests, the degrees of freedom are calculated as:

$df=N-1=33-1=32$

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4 years ago

Find the exact area of the octagon. show your reasoning?

strojnjashka [21]

Since there are as many of these triangles as the polygon has sides (eight for an octagon), you have to multiply the area of this triangle by the number of sides. You will obtain the total area of the octagon: area of octagon = 8 * base * height / 2 = perimeter * apothem / 2 .

i hope this helped you :)

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4 years ago