in forming a 95% confidence interval for a population mean from a sample size of 20, we can proceed with large sample inference. True or False ?

Answer:

4 < x < 12

Step-by-step explanation:

x - 8 ≥ 0

x ≥ 8

If x ≥ 8

9(x-8) < 36

9x - 72 < 36

9x < 36 + 72

9x < 108

9/9 x < 108/9

x < 12

8 ≤ x < 12

if x < 8

9(-x+8) < 36

-9x + 72 < 36

-9x < 36 - 72

-9x < -36

-9/-9 x > -36/-9

x > 4

4 < x < 8

4<x<12

The statements that are necessary to prove the two triangles are congruent by SSS are AD≅ AD, BD ≅ CD, and AB ≅ AC.

What is congruence?

In geometry, two figures or objects are said to be congruent if their shapes and sizes match, or if one is the mirror image of the other.

Here,

To prove that two triangles are congruent using the SSS Congruence criterion, we must establish that all three sides of one triangle are equal to all the corresponding sides of the other.

Thus,

Side AD in ∆ADB is congruent to side AD in ∆ADC.

Side BD in ∆ADB is congruent to side CD in ∆ADC.

Side AB in ∆ADB is congruent to side AC in ∆ADC.

Hence, based on the SSS congruence criterion, it is concluded that both triangles are congruent. i.e  AD≅ AD, BD ≅ CD, AB ≅ AC.

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Answer:

D

Step-by-step explanation:

To prove that two triangles are congruent using the SSS Congruence criterion, we must establish that all three sides of one triangle are equal to all the corresponding sides of the other.Thus,Side AD in ∆ADB is congruent to side AD in ∆ADC.Side BD in ∆ADB is congruent to side CD in ∆ADC.Side AB in ∆ADB is congruent to side AC in ∆ADC.Therefore, based on the SSS congruence criterion, it is concluded that both triangles are congruent.The statements necessary to prove that they are congruent by SSS is: D

The discount price of the shirt will be $15.

A percentage is a value or ratio that may be stated as a fraction of 100. If we need to calculate a percentage of a number, we should divide it's entirety and then multiply it by 100. The percentage therefore refers to a component per hundred. Per 100 is what the word percent means. It is represented by %.

From the information, the store offers a 25% discount and the regular price of a t-shirt is $20. Therefore, based on the information illustrated, the main points to note will be:

Discount = 25%

Regular price = $20.

In this case, the discount price will be the difference between the regular price and the discount.

The discount price will be:

= Regular price - Discount

= $20 - ($20 × 25%)

= $20 - $5

= $15

The price is $15.

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Complete question

everything at a store is on sale. The store offers a 25% discount. The regular price of a t-shirt is $20. What is the discount price? Please help me

Answer:

1120

Step-by-step explanation:

Given the information below:

The Relative Frequency of selling a pan style pizza =

Therefore, if Valentino's Pizzeria were to sell 4000 pizzas, the expected number of Pan style pizza sold will be:

Number of Pan Style Pizza Sold = Relative Frequency of pan Style Pizza Purchase X Total Number of Sales

They should expect to sell 1120 pan Style pizzas.

if the markup is 11%, well, we simply add that to the cost of the item, in this case 18.

[tex]\begin{array}{|c|ll} \cline{1-1} \textit{\textit{\LARGE a}\% of \textit{\LARGE b}}\\ \cline{1-1} \\ \left( \cfrac{\textit{\LARGE a}}{100} \right)\cdot \textit{\LARGE b} \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{11\% of 18}}{\left( \cfrac{11}{100} \right)18}\implies 1.98~\hfill \underset{selling~price}{\stackrel{18 ~~ + ~~1.98}{\text{\LARGE 19.98}}}[/tex]

Yes, it makes sense to discuss the similarity between these shapes.

Two shapes are considered similar if they have the same shape, but possibly different sizes. This means that the angles of the shapes are the same and the sides of the shapes are in the same ratio.

Two rhombi are similar if they have the same angle measures and the lengths of their sides are in the same ratio.

Two squares are similar if they have the same angle measures and the lengths of their sides are in the same ratio.

Two rectangles are similar if they have the same angle measures and the lengths of their sides are in the same ratio.

Two parallelograms are similar if they have the same angle measures and the lengths of their sides are in the same ratio.

Two congruent polygons are similar by definition, since congruent shapes are identical in size and shape.

It is important to note that similarity is different from congruence. Congruent shapes are identical in size and shape, whereas similar shapes have the same shape but possibly different sizes.

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The concurrent parts in the given ABDE are Side AB ≅ Side ED and Side AE ≅ Side BD.

Two triangles are said to be congruent if all three corresponding sides and all three corresponding angles have the same size. These triangles may be moved, flipped, twisted, and turned to get a similar effect. When relocated, they are parallel to one another. The concurrence sign is '≅'.

Here we have,

ABDE is an isosceles trapezoid.  

Draw 2 diagonals in a given trapezoid

Then the 2 diagonal  will divide the trapezoid into 4 triangles

Here ΔAOB, ΔBOD, ΔEOD, and AOE

From the formed triangles

ΔAOB and ΔEOD will be two concurrent triangles

Then Side AB ≅ Side ED  

ΔBOD and AOE will be two concurrent triangles

Side AE ≅ Side BD    

Therefore,

The concurrent parts in the given ABDE are Side AB ≅ Side ED and Side AE ≅ Side BD.    

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The required answer in the given problem, given weight of 5 kilograms and  convert it to 11.02 pounds. By multiplying the given weight by the conversion factor of 2.204 pounds/kilogram,  obtain the weight in pounds.

Conversion from kilograms to pounds:

To convert a weight value from kilograms to pounds, we use the conversion factor of 1 kilogram equals 2.204 pounds. This means that for every 1 kilogram, there are 2.204 pounds. To convert a weight from kilograms to pounds, we multiply the given value in kilograms by the conversion factor.

To convert 110 kilograms to pounds, we can use the conversion factor that states 1 kilogram is equal to 2.204 pounds. Here's the step-by-step process:

Step 1: Write down the given weight in kilograms, which is 110 kilograms.

Step 2: Multiply the given weight by the conversion factor:

110 kilograms x 2.204 pounds/kilogram

Step 3: Perform the multiplication:

110 x 2.204 = 242.44 pounds

Therefore, 110 kilograms is equal to 242.44 pounds.

In the given problem, given weight of 5 kilograms and  convert it to 11.02 pounds. By multiplying the given weight by the conversion factor of 2.204 pounds/kilogram,  obtain the weight in pounds.

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Answer:

4 m^3 - 38 m^2 + 57 m - 72 = (4 m^2 - 6 m + 9)(m - 8) + 0

Step-by-step explanation:

Compute (4 m^3 - 38 m^2 + 57 m - 72) ÷ (m - 8) using polynomial long division:

m - 8 | 4 m^3 | - | 38 m^2 | + | 57 m | - | 72

To eliminate the leading term of the numerator, 4 m^3, multiply m - 8 by 4 m^2 to get 4 m^3 - 32 m^2. Write 4 m^2 on top of the division bracket and subtract 4 m^3 - 32 m^2 from 4 m^3 - 38 m^2 + 57 m - 72 to get -6 m^2 + 57 m - 72:

| | | 4 m^2 | | | |

m - 8 | 4 m^3 | - | 38 m^2 | + | 57 m | - | 72

| -(4 m^3 | - | 32 m^2) | | | |

| | | -6 m^2 | + | 57 m | - | 72

To eliminate the leading term of the remainder of the previous step, -6 m^2, multiply m - 8 by -6 m to get -6 m^2 + 48 m. Write -6 m on top of the division bracket and subtract -6 m^2 + 48 m from -6 m^2 + 57 m - 72 to get 9 m - 72:

| | | 4 m^2 | - | 6 m | |

m - 8 | 4 m^3 | - | 38 m^2 | + | 57 m | - | 72

| -(4 m^3 | - | 32 m^2) | | | |

| | | -6 m^2 | + | 57 m | - | 72

| | | -(-6 m^2 | + | 48 m) | |

| | | | | 9 m | - | 72

To eliminate the leading term of the remainder of the previous step, 9 m, multiply m - 8 by 9 to get 9 m - 72. Write 9 on top of the division bracket and subtract 9 m - 72 from 9 m - 72 to get 0:

| | | 4 m^2 | - | 6 m | + | 9

m - 8 | 4 m^3 | - | 38 m^2 | + | 57 m | - | 72

| -(4 m^3 | - | 32 m^2) | | | |

| | | -6 m^2 | + | 57 m | - | 72

| | | -(-6 m^2 | + | 48 m) | |

| | | | | 9 m | - | 72

| | | | | -(9 m | - | 72)

| | | | | | | 0

The quotient of (4 m^3 - 38 m^2 + 57 m - 72)/(m - 8) is the sum of the terms on top of the division bracket. Since the final subtraction step resulted in zero, m - 8 exactly divides 4 m^3 - 38 m^2 + 57 m - 72, and there is no remainder.

| | | 4 m^2 | - | 6 m | + | 9 | (quotient)

m - 8 | 4 m^3 | - | 38 m^2 | + | 57 m | - | 72 |

| -(4 m^3 | - | 32 m^2) | | | | |

| | | -6 m^2 | + | 57 m | - | 72 |

| | | -(-6 m^2 | + | 48 m) | | |

| | | | | 9 m | - | 72 |

| | | | | -(9 m | - | 72) |

| | | | | | | 0 | (remainder) invisible comma

(4 m^3 - 38 m^2 + 57 m - 72)/(m - 8) = (4 m^2 - 6 m + 9) + 0

Write the result in quotient and remainder form:

Answer: 4 m^3 - 38 m^2 + 57 m - 72 = (4 m^2 - 6 m + 9)(m - 8) + 0

Answer: The correct answer is (d) 89,200 games.

To find the number of games that must be sold, we need to set up an equation to represent the total revenue from the game sales and solve for the number of games sold.

The total revenue from the game sales is equal to the number of games sold multiplied by the price per game, minus the cost of research and development.

Let X be the number of games sold

Total revenue = X * $2 - $160,000

We also know that the total cost of producing the games is equal to the number of games produced multiplied by the cost per game.

Total cost = X * $0.20

We can set the total revenue equal to the total cost and solve for X:

X * $2 - $160,000 = X * $0.20

X = 89,195

Since we gave away the first 275 games for free, we need to add 275 to the number of games sold to find the total number of games that must be sold.

Total number of games sold = X + 275 = 89,195 + 275 = 89,470

Therefore, the correct answer is (d) 89,200 games.

in this given question 30% of 12 will be 3.6.

What is the percentage?

A percentage that represents a tenth of a quantity. One percent, denoted by the symbol 1%, is equal to one-hundredth of something; hence, 100 percent denotes the full thing, and 200 percent designates twice the amount specified. A portion per hundred is what the percentage denotes. The percentage refers to one in a hundred. The % sign is used to denote it.

30% of the total is 12 grams

So the given 30% of 12 will be

12*30/100

=3.6

Hence, in this given question 30% of 12 will be 3.6.

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Answer:

Step-by-step explanation:

To find the sum of 7x^2+x+1 and -6x^2-8x-10, you can add the two expressions by combining like terms.

7x^2+x+1 + (-6x^2-8x-10)

= (7x^2 + -6x^2) + (x + -8x) + (1 + -10)

= x^2 + -7x + -9

Therefore, the sum of 7x^2+x+1 and -6x^2-8x-10 is x^2 - 7x - 9.

Ok⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

Answer: 4

Step-by-step explanation: If you are trying to see how many Mario missed that would be 4

Both the expressions are equivalent to each other.

What do you mean by algebraic expression?

The concept of algebraic expressions is the use of letters or alphabets to represent numbers without providing their precise values. We learned how to express an unknown value using letters like x, y, and z in the fundamentals of algebra. Here, we refer to these letters as variables. Variables and constants can both be used in an algebraic expression. A coefficient is any value that is added before a variable and then multiplied by it.

Given expression:

LHS

0.4(k+3)

= 0.4k + 0.4 × 3

= 0.4k + 1.2

RHS

0.4 k+1.2

LHS = RHS

Therefore, both the expressions are equivalent to each other.

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The events P(A) = 0.22 P(B) = 0.45, P(A and B) = 0.099 and rolling a pair of dice at the same time are independent events. Others are dependent events.

Independent events are events for which the occurrence of this event does not depend on any other events.

Dependent events are those events for which it's occurrence depends on other events.

Two events A and B are independent, if

P(A | B) = P(A)

P(A and B) = P(A) × P(B)

P(A) = 0.65, P(B) = 0.25 and P(A and B) = 0.40

P(A) × P(B) = 0.65 × 0.25 = 0.1625 ≠ P(A and B)

∴ A and B are dependent events.

P(A) = 0.22 P(B) = 0.45 and P(A and B) = 0.099

P(A) × P(B) = 0.22 × 0.45 = 0.099 = P(A and B)

∴ A and B are independent events.

P(A) = 0.42 P(B) = 0.62 and P(A| B) = 0.2604

P(A| B) = 0.2604 ≠ P(A)

∴ A and B are dependent events.

If you roll a pair of dice at the same time, probability for any number to occur on dice 1 does not affect the probability of any number to occur on dice 2.

∴ A and B are independent events.

If you choose two marbles from a bag, when the first marble is chosen, then the second marble you choose will not be the first marble in any case. So second event depends on the first event.

∴ A and B are dependent events.

Hence, as P(A and B) = P(A) × P(B) satisfies for the events P(A) = 0.22 P(B) = 0.45, P(A and B) = 0.099, is is independent events. Also rolling a pair of dice at the same time is also independent events. The rest of the events are dependent events as it does not satisfies the condition for independent events.

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Answer:

−225x^6y^4

Step-by-step explanation:

Being a female and participating in sports are independent events for the provided data because P(girl) = P(girl participates in sports)

These are the occurrences that are independent of other occurrences.

Occurrences A and B are independent events when the likelihood of one occurring is unaffected by the occurrence of the other.

Probability of independent events formula:

"P(A∩B) = if A and B are independent occurrences P(A).P(B)

Finding the chance that an event will occur is the focus of this area of mathematics."

P(A) = n(A)/n(S), where n(A) is the number of positive outcomes and n(S) is the total number of possible outcomes for an event A.

For given question,

We have been given a table that shows the results broken down by gender.

            Play sports         Do not play sports       Total

Boy            95                          45                        140

Girl             76                           59                       135

Total          171                            104                     275

Using the definition of probability:

⇒ P(girl)  = Number of girls/ Number of students

⇒ P(girl) = 135/275

⇒ P(girl) = 0.49                    ....................(1)

Now we find the probability of girls that play a sport.

Using the definition of probability:

P(girl plays a sport)

= Number of girls who plays a sport/ number of students who plays a sport

= 76/ 171

= 0.44                                    ......................(2)

From (1) and (2),

P(girl) = P(girl plays a sport)

Thus, being a girl and playing a sport are Independent events.

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W will be 15.84.

The definition of an equation in algebra is a mathematical statement proving the equality of two mathematical expressions. For instance, the equation 3x + 5 = 14 has the two expressions 3x + 5 and 14 that are separated by the 'equal' sign.

We know that w divided by 1.1 minus 3.9 equals 10.5

That will be W/1.1 - 3.9 = 10.5

W/1.1 = 10.5 + 3.9

W/1.1 = 14.4

W = 14.4* 1.1

W = 15.84

W will thus equal 15.84.

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The original cost of the speaker will be equal to $125.3. The correct option is D.

The percentage is defined as representing any number with respect to 100. It is denoted by the sign %. The percentage stands for "out of 100." Imagine any measurement or object being divided into 100 equal bits.

Given that a waterproof speaker sells for $179, which is marked up by 30% of the selling price.

The cost price of the speaker will be calculated as,

Cost price = 179 x 0.7

Cost price = $125.3

Therefore, the original cost of the speaker will be equal to $125.3. The correct option is D.

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The height of the object is 20 feet.

In general, the term "proportion" refers to a part, share, or amount that is compared to a total.

According to the concept of proportion, two ratios are in proportion when they are equal.

A mathematical comparison of two numbers is called a proportion. According to proportion, two sets of provided numbers are said to be directly proportional to one another if they increase or decrease in the same ratio. "::" or "=" are symbols used to indicate proportions.

Given:

An observer whose eye level is 5 ft is observing the top of an object with a mirror on the ground.

The mirror is 3 feet from the observer and 12 feet from the object.

Using proportion

5/ 3= x/ 12

60= 3x

x = 20 feet

hence, the height of the object is 20 feet.

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Answer:

34

Step-by-step explanation:

This is somewhat hard to explain for me. I attached a picture/diagram to help.

They are congruent angles.

Angle N, inside the MNP triangle is 34. Which means the adjacent angle is 56.

The interior angles of a triangle add up to 180.

So to find angle M in triangle LNM, we can do 180 - 90 - 56.

Therefore the m<LMN = 34

If the three side lengths are all different then you will only get one triangle. However, if two or more of the side lengths are the same then you can get more than one triangle.

A triangle is a polygon with three vertices and three sides. The angles of the triangle are formed by the connection of the three sides end to end at a point. The triangle's three angles add up to 180 degrees in total

Three diagonals must meet at three different locations to form a triangle. There are five possible arrangements of three diagonals. We categorize them according on how many different diagonal endpoints there are. The quantity of triangles with 3, 4, and 5 endpoints will be counted directly.

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the values of r, x, and y are related to the sine, cosine, and tangent of angle ø as:

sin ø = y / r

cos ø = x / r

tan ø = y / x

What is trigonometry?

Trigonometry is a branch of mathematics that studies relationships between side lengths and angles of triangles.

In a right triangle, the sides are typically labeled as follows:

The side opposite the angle ø is called the "opposite side" and is labeled "y".

The side adjacent to angle ø is called the "adjacent side" and is labeled "x".

The hypotenuse is the side opposite the right angle and is labeled "r".

The values of r, x, and y can be used to calculate the sine, cosine, and tangent of angle ø. These trigonometric functions are defined as follows:

Sine (sin ø): sin ø = y / r

Cosine (cos ø): cos ø = x / r

Tangent (tan ø): tan ø = y / x

Hence, the values of r, x, and y are related to the sine, cosine, and tangent of angle ø through the above equations.

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83.01dB is approximate combined sound pressure level.

What is sound pressure level?

The result of the pressure changes in the air caused by sound waves is sound pressure, often known as sound pressure level. The hearing threshold is the lowest sound pressure that a human can hear, and the pain threshold is the maximum sound pressure that a person can tolerate.

The difference between sound pressure at the pain threshold and the hearing threshold is a million times higher.

We have sound pressure level denoted as (Lp) of each machine

i.e 80 dB,(given).

Therefore, we can calulate sound pressure level from both machines combined by given formula,

SPL = 10 * Log(10^(SPL(1) /10)  + 10^(SPL(2) /10) +10^(SPL(3) /10) + ............)

   where,

      SPL= sound pressure level(dB)

 => SPL = 10 * Log(10^(80 /10) + 10^(80 /10))

 => SPL = 10 * Log(10^8 + 10^8)

 => SPL = 10 * 8.301

 => SPL = 83.01dB

Hence, 83.01dB is approximate combined sound pressure level.

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The test statistic and the p-value of the research are respectively z = 1.9072 and p-value = 0.0283 and the conclusion is that; D) There is not sufficient sample evidence to support the claim that the proportion of stocks that went up is is more than 0.3.

Let us first of all define the hypotheses;

Null Hypothesis; H₀: p ≤ 0.3

Alternative Hypothesis; Hₐ: p > 0.3

Sample proportion is;

p^ = 29/72 = 0.403

The formula for the test statistic is;

z = (p^ - p)/(√(p(1 - p)/n))

Plugging in the relevant values gives;

z = (0.403 - 0.3)/(√(0.3(1 - 0.3)/72))

z = 1.9072

From p-value from z-score calculator, we have that;

p-value = 0.0283

p-value is greater than the significance value and as such we fail to reject the null hypothesis and conclude that There is not sufficient sample evidence to support the claim that the proportion of stocks that went up

is is more than 0.3.

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Answer:

11.6 years

Step-by-step explanation:

1800 = 900 x (1 + 0.06/12)^ 12t

1800 = 900 x (1 + 0.005)^12t

1800 = 900 x (1.005)^12t

1800 = 900 x 1.061678^t

1800/900 = (900 x 1.061678^t)/ 900

2 = 1.061678^t

log(1.061678) 2 = t

t = 11.5813

t = 11.6

Showing that this need not be true if f is continuous but not uniformly continuous.

Given :

let f be a uniformly continuous function on a set e. show that if {xn} is a cauchy sequence in e then {f(xn)} is a cauchy sequence in f(e).

( 1 )

If f is uniformly continuous on E, then given ε > 0 there is δ > 0 such that if x, y are in E and |x−y| < δ,

then |f(x) − f(y)| < ε. Let (xn) be a Cauchy sequence in E. Then given δ > 0 there is N such that if p, q > N,

then |xp − xq| < δ, and thus |f(xp) − f(xq)| < ε, implying that (f(xn)) is a Cauchy sequence.

( 2 )

Let E = {1, 1/2, 1/3, · ·  } and f(1/n) = 1 is n is odd, f(1/n) = −1 if

n is even. Then f is continuous but not uniformly continuous. The sequence (xn) = (1/n) in E is Cauchy but the

sequence (f(xn)) = (1, −1, 1, −1, · · ·) is not Cauchy.

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a) If only your employer makes the monthly deposits into your retirement account for the future value of $500,000 in 40 years at 7% APR, your employer contributions should be $190.49.

b) If only your employer makes the monthly deposits into your retirement account for the future value of $500,000 in 40 years at 4% APR, your employer contributions should be $423.03.

The future value represents the amount expected to be the balance in the investment account after a period.

The future value can be used to determine the periodic payments required to meet the target balance, using an online finance calculator.

N (# of periods) = 480 months (40 years x 12)

I/Y (Interest per year) = 7%

PV (Present Value) = $0

FV (Future Value) = $500,000

Results:

PMT (Periodic deposits) = $190.49

Sum of all periodic payments = $91,435.07

Total Interest = $408,564.93

N (# of periods) = 480 (40 years x 12)

I/Y (Interest per year) = 4%

PV (Present Value) = $0

FV (Future Value) = $500,000

Results:

PMT (Periodic deposits) = $423.03

Sum of all periodic payments = $203,052.33

Total Interest = $296,947.67

Thus, the periodic deposits to meet the future value will depend on the interest rate.

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The expression is obtained by simplifying it by the distributive Property is x³-4x²+3x-12.

The distributive property is the property that expresses the distributive law of algebraic multiplication. Similarly, in polynomial expression we can use the distributive property, for example, we can write a(c+b)  in the form of (ac+bc).

It is given that, the expression is (x² + 3)(x − 4)

The expression is simplified using the distributive property as,

=(x² + 3)(x − 4)

=x²(x − 4)+3(x − 4)

=x³-4x²+3x-12

Thus, the expression is obtained by simplifying it by the distributive Property is x³-4x²+3x-12.

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The multiplication of the term (x² + 3)(x - 4) using distributive property is x³ - 4x² + 3x - 12.

Distributive property explains to us how to solve expressions in the form of a(b + c).

After apply distributive property, this term converts as ab+ac

The given expression is,

(x² + 3)(x - 4)

Solve by using distributive property formula (a+b)(c+d)= a(c+d) + b(c+d),

x²(x - 4) + 3(x - 4)

Now further simplify by using formula a(b+c) = ab+ac,

x³ - 4x² + 3x - 12.

The required multiplication of the given terms is x³ - 4x² + 3x - 12.

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