Use distributive law evaluate

Answers

Answer 1

Answer:

The distributive property allows you multiply a sum in parenthesis by multiplying each addend separately, then add the products.

Step-by-step explanation:

How to use the distributive law example.

2(x+4) = 16

To use the distributive law in this example multiply 3 by all terms in the parenthesis. Multiply 2 and x, then 2 and 4 to open the parenthesis.

2x+8=16

That is how you use the distributive law.

To continue solving, subtract 8 from both sides.

2x+8-8=16-8

2x=8

Divide 2 from both sides.

2x/2=8/2

x=4

Hope this helps!

If not, I am sorry.


Related Questions

Convert from Decimal Notation to Scientific Notation
In the following exercises, write each number in scientific notation.
556. 0.00000871

Answers

Answer:

Hence, 0.0000087 can be expressed as [tex]$8.71 \times 10^{-6}$[/tex].

Step-by-step explanation:

- Given 0.00000871

- Move the decimal point so that the factor is greater than or equal to 1 but less than 10 .

- Then count n and write no. as product with a power of 10 .

Step 1 of 1

Consider 0.00000871,

8.71

Decimal has moved 6 places to right.

The power will be negative as the original no. is less than 1 .

[tex]$$\begin{array}{r}8.71 \times 10^{-6} \\0.0000087=8.71 \times 10^{-6}\end{array}$$[/tex]

Find m/HFG if m/EFG = 2x + 52, m/EFH = 21°, and
m/HFG = x + 31.

Answers

Answer:

31°

Step-by-step explanation:

Given Angle EFG = Angle EFH + Angle HFG (based on the diagram)

[tex]2x+52 = 21 + (x+31)\\2x+52 = 21+x+31\\2x+52=x+52\\2x-x+52=52\\x+52=52\\x=52-52\\x=0[/tex]

From here we can see the value of x is non-existent.

Substitute x to find Angle HFG.

x+31 = 0 + 31 = 31°

A scuba diver is 50 ft below sea level. Which of the following best describes this situation?
1. |50|
2. -50
3. +50
4. ±50

Answers

Answer:

-50

Explanation:

At sea level would be 0 so anything above would be a positive number and anything below a negative number.

It’s -50 cus below sea level is a negative number and above sea level is a positive

If my savings of $x grows 10% each year, how much will I have in 2 years?

Answers

Answer:

1.21x

Step-by-step explanation:

we can write 100% as 1

then 10% is 0.1

then 1.1x = is first

1.1*1.1x = 1.21x or 121% of x

The savings of $x grows 10% each year after 2 year it will become  1.21x .

What is compound interest?

Compound interest is an interest accumulated on the principal and interest together over a given time period. The interest accumulated on a principal over a period of time is also accounted under the principal.

The formula of Compound interest :

[tex]A= P(1+\frac{r}{100} )^{t}[/tex]

where,

A = Final amount

P = initial Principal

t = Time in years

r = rate of interest per annum  

According to the question

Principal = $x

Rate of interest per annum  =  10%

Time in years = t

By using formula of Compound interest :

[tex]A= P(1+\frac{r}{100} )^{t}[/tex]  

Now ,

Substituting the values in the formula

[tex]A= x(1+\frac{10}{100} )^{2}[/tex]

[tex]A= x(1.1} )^{2}[/tex]  

[tex]A= 1.21x[/tex]

Hence, the savings of $x grows 10% each year after 2 year it will become   1.21x .

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Which ordered pair is a solution of the equation 3x + y = 15?

Answers

Answer: 3(3)+6=15

Step-by-step explanation:

X=3 and the Y=6

( ) means multiplying so it 3 multiplied (3) and add 6 which Is the Y then you got the answer which is 15.

The area of a rectangle is 59.5 square inches. The base of the
rectangle is 7 inches.
What is the height of the rectangle, in inches?
O A. x = 52.5 in
OB. x = 8.5 in
OC. x= 416.5 in
OD. x= 22.75 in

Answers

Answer:

Step-by-step explanation:

Givens

Area = 59.5 in^2

Base =  7 inches

height = h

Solution

Area = Base * height                 Substitute what you know in the formula

59.5 = 7 * h                                 Divide both sides by 7

59.5/7 = 7h / 7                            

h = 8.5

Answer height = 8.5

Answer:

Answer B is correct

Step-by-step explanation:

The formula to find the area of a rectangle is :

Area = Base × Height

Given that,

Area ⇒ 59.5 in²

Base ⇒ 7 in

Height ⇒?

Let the height of the rectangle be x.

First, let us make an expression to find the value of h.

Area = Base × Height

59.5 = 7 × x

And now let us solve for x.

59.5 = 7h

Divide both sides by 7.

x = 8.5 in

7
Solve the system of inequalities by graphing.
2x + 5y < 25
y < 3x-2
5x - 7y < 14 DUE NOW

Answers

The solution to the inequality 2x + 5y < 25, y < 3x-2 and 5x - 7y < 14 is the dark triangular region shown in the graph.

What is an equation?

An equation is an expression that shows the relationship between two or more variables and numbers.

Inequality shows the non equal comparison of two or more numbers and variables.

The solution to the inequality 2x + 5y < 25, y < 3x-2 and 5x - 7y < 14 is the dark triangular region shown in the graph.

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A toy manufacturer wants to know how many new toys children buy each year. A sample of 1492 children was taken to study their purchasing habits. Construct the 99% confidence interval for the mean number of toys purchased each year if the sample mean was found to be 8.8. Assume that the population standard deviation is 2.2. Round your answers to one decimal place.

Answers

By assuming the standard deviation of population 2.2 the confidence interval is 8.67 toys,8.94 toys.

Given sample size of 1492 children,99% confidence interval , sample mean of 8.8, population standard deviation=2.2.

This type of problems can be solved through z test and in z test we have to first find the z score and then p value from normal distribution table.

First we have to find the value of α which can be calculated as  under:

α=(1-0.99)/2=0.005

p=1-0.005=0.995

corresponding z value will be 2.575 for p=0.995 .

Margin of error=z*x/d

where x is mean and d is standard deviation.

M=2.575*2.2/[tex]\sqrt{1492}[/tex]

=0.14

So the lower value will be x-M

=8.8-0.14

=8.66

=8.67 ( after rounding)

The upper value will be x+M

=8.8+0.14

=8.94

Hence the confidence interval will be 8.67 toys and 8.94 toys.

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cChoose all that apply. If a population is decreasing in size, you would expect lambda to be ___________________ and r to be _______________________.

Answers

If the population can be shown to be decreasing in size, then the lambda would be positive while the r would be negative.

What happens when the population is decreasing?

When the population is decreasing, the rate would be negative because the population is shrinking. This is why r - which is rate - will be negative.

Lambda on the other hand will be positive to show that the population started from a higher value and is now decreasing.

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What is the solution of the equation (x – 5)2 3(x – 5) 9 = 0? use u substitution and the quadratic formula to solve.

Answers

The value of x in the equation [tex](x-5)^{2} +3(x-5)+9=0[/tex]is x=(7+3[tex]\sqrt{3}i[/tex])/2,

(7-3[tex]\sqrt{3}i[/tex])/2.

Given equation [tex](x-5)^{2} +3(x-5)+9=0[/tex] .

We have to find the solution of the equation.

Equation  is solved to find the value of variables. The number of values of the variable depends on the highest power of variables.

let (x-5)=u-------------------1

equation becomes [tex]u^{2} +3u+9=0[/tex]

solution of a quadratic formula

x=-b±[tex]\sqrt{b^{2} -4ac}[/tex]/2a

on comparing with general form a=1,b=3, c=9

u=-3±[tex]\sqrt{3^{2} -4*1*9} /2[/tex]

=-3±[tex]\sqrt{9-36}/2[/tex]

=-3±[tex]3\sqrt{-27}/2[/tex]

=-3±[tex]3\sqrt{3} i/2[/tex]

[tex]u_{1} =-3[/tex]+3[tex]\sqrt{3}/2[/tex] , [tex]u_{2}[/tex]=-3-3[tex]\sqrt{3}/2[/tex]

put the values of [tex]u_{1}[/tex] in equation 1

x-5=[tex]u_{1}[/tex]

x-5=-3+[tex]3\sqrt{3} /2[/tex]

x=-3+3[tex]\sqrt{3}i/2+5[/tex]

x=7+3[tex]\sqrt{3} i/2[/tex]

put the values of [tex]u_{2}[/tex] in  equation2

x-5=[tex]u_{2}[/tex]

x-5=-3-3[tex]\sqrt{3} /2[/tex]

x=7-3[tex]\sqrt{3}/2[/tex]

Hence the values of x are 7+3[tex]\sqrt{3}i/2[/tex], 7-3[tex]\sqrt{3}i/2[/tex].

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5. How many 6-digit numbers can be formed from the digits 0,1,3,5,7 and 9 which are divisible by 10 and no digit is repeated?

Answers

There are 120 6-digit numbers that can be formed

How to determine the combination of digits?

The digits are given as:

0,1,3,5,7 and 9

Since the number must be divisible by 10.

Then the number must end in 0

The other 5 digits can take any of the 0,1,3,5,7.

So, the number of combination is:

Count = 5! * 1

Expand

Count = 5 * 4 * 3 *2 * 1 * 1

Evaluate

Count = 120

Hence, there are 120 6-digit numbers that can be formed

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Write the first five terms of the sequence. an = n 2 + 2 2, 3, 6, 11, 18 3, 6, 9, 12, 15 3, 6, 11, 18, 27

Answers

The first five terms of the sequence will be 3, 6, 11, 18, 27. Then the correct option is C.

What are sequence and series?

A sequence is a list of elements that have been ordered sequentially, such that members come either before or after.

The equation will be given below.

[tex]\rm a_n = n^2+2[/tex]

Then the first five terms of the sequence will be

For n = 1, we have

a₁ = 1² + 2

a₁ = 3

For n = 2, we have

a₂ = 2² + 2

a₂ = 6

For n =3, we have

a₃ = 3² + 2

a₃ = 11

For n = 4, we have

a₄ = 4² + 2

a₄ = 18

For n = 5, we have

a₅ = 5² + 2

a₅ = 27

Then the sequence will be 3, 6, 11, 18, 27.

Then the correct option is C.

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The sum of two numbers is 79. Three
times the first number added to 5 times
the second number is 283. What are the
two numbers?

Answers

Answer:

The two numbers are 23 and 56

Step-by-step explanation:

Let's say the two numbers are A and B.

We are told:

1)  A+B=79

2) 3A+5B=283

Let's take the first expression and solve for A:

A+B=79

A=79-B

Now use this value of A in the second expression:

3A+5B=283

3(79-B)+5B=283

237-3B+5B=283

2B = 46

B = 23

Since B=23, we know from 1) that

A+B=79

A+23=79

A = 56

CHECK:

Does A+B=79?  

        56+23 = 79?  YES

Does 3A+5B=283?

3(56)+5(23)=283

168  + 115 = 283?  YES

The 2 numbers are 56 and 23
Explanation:
56+23=79
56X3=168
23X5=115
168+115=283

help me please 10 points!!

Answers

Answer:

104m²

Step-by-step explanation:

we can find the area of a trapezoid from its bases and height in the following formula:

[tex]A=\frac{a + b}{2}h[/tex]

where...

A: area

a: one base

b: other base

h: height

here, we can see that our two bases are 9 and 17, and that our height is 8.

Now, let's plug these values into our formula:

a: 9

b: 17

h: 8

[tex]A=\frac{a + b}{2}h[/tex]

[tex]A=\frac{9 + 17}{2}8[/tex]

Now, we can simplify:

[tex]A=\frac{9 + 17}{2}8[/tex]

[tex]A=\frac{26}{2}8[/tex]

A = 13 · 8

A = 104

so, the area of this trapezoid is 104m²

(note: we write area as squared / in square units)

hope this helps! have a lovely day :)

In an election, 1200 total votes were cast for the 3 candidates. The second-place candidate received 155 fewer votes than the winner and 200 votes more than the third-place candidate. How many votes did the winner receive

Answers

The winner received 570 votes.

Let the winner candidate be c1

Let the  second-place candidate be c2

Let the  third-place candidate be c3

[tex]c2=c1-155\\[/tex].........equation 1

[tex]c2=c3+200\\[/tex]

[tex]c3=c2-200 \\[/tex]

[tex]c3=c1-155-200\\[/tex].........by equation 1

[tex]c3=c1-355[/tex]........equation 2

Now we know,

[tex]c1+c2+c3=1200[/tex]

[tex]c1+(c1-155)+(c1-355)=1200[/tex] .....by equations 1 and 2

[tex]3c1-510=1200[/tex]

[tex]3c1=1200+510\\3c1=170\\c1=570[/tex]

Hence, The winner received 570 votes.

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What is tan 30°?
1
60
90°
√3
2
30⁰
OA. √2
OB.
O C.
O D.
√√3
√√3
OE. √3
O F. 1

Answers

Answer: [tex]\frac{\sqrt{3}}{3}[/tex]

Step-by-step explanation:

[tex]\tan 30^{\circ}=\frac{\sin 30^{\circ}}{\cos 30^{\circ}}=\frac{\frac{1}{2}}{\frac{\sqrt{3}}{2}}=\frac{1}{\sqrt{3}}=\frac{\sqrt{3}}{3}[/tex]

The value of the trigonometric relation tan 30° = 1/√3

What are trigonometric relations?

Trigonometry is the study of the relationships between the angles and the lengths of the sides of triangles

The six trigonometric functions are sin , cos , tan , cosec , sec and cot

Let the angle be θ , such that

sin θ = opposite / hypotenuse

cos θ = adjacent / hypotenuse

tan θ = opposite / adjacent

tan θ = sin θ / cos θ

cosec θ = 1/sin θ

sec θ = 1/cos θ

cot θ = 1/tan θ

Given data ,

Let the trigonometric relation be represented as A

Now , the value of A is

A = tan 30°

And , tan θ = sin θ / cos θ

On simplifying , we get

sin 30° = 1/2

cos 30° = √3/2

Substituting the values in the equation , we get

tan 30° = sin 30° / cos 30°

tan 30° = ( 1/2 ) / ( √3/2 )

tan 30° = 1/√3

Hence , the value of relation tan 30° is 1/√3

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HELPS I NEED THE ANSWER PLSSSSSSSSSSSS!

Answers

Answer:

5.5x+7.146 (the six is repeating)

Step-by-step explanation:

Answer:

5.5x + 7.25

Step-by-step explanation:

5.5(x+6.5)-(x+9.5)-(19-x)              Convert the fractions to decimal

5.5x+35.75 -x - 9.5 - 19 +x         Expand

(5.5x - x + x) +(35.75 - 9.5 - 19)  Group like terms

5.5x + 7.25                                 Combine like terms

GEOMETRY)
Fill in the blanks:

How many degrees is arc PA?

How many degrees is angle PRA?

Line PR is a diameter of the circle. How many degrees is arc PAR?

How many degrees is arc AR?

(The picture is below and Q is the one above the circle and A at the bottom of the circle)

Answers

Part 1

By the inscribed angle theorem, arc PA measures 62 degrees.

Part 2

Angles inscribed in the same arc are congruent, so angle PRA measures 31 degrees.

Part 3

Diameters form semicircles, and the arc of a semicircle measures 180 degrees, so arc PAR measures 180 degrees.

Part 4

Subtracting arc PA from arc PAR, we get arc AR measures 118 degrees.

(b) In the figure, AABC and ACDE are equilateral triangles. Prove that: AD = BE.

i have sent the picture of the figure also please send the solution fast​

Answers

Given

Triangles ABC and CDE are equilateral.

We need to

Prove that AD and BE are congruent.

Solution

Since both the given triangles are equilateral, their interior angles are each measure 60°.

Consider triangles ADC and BEC.

We have:

AC = BC (given)DC = EC (given)ACD = ACB + BCD = 60 + BCD (angle addition)ECB = ECD + BCD = 60 + BCD (angle addition)

According to above, two sides and the included angle of triangles ADC and BEC are congruent by ASA.

Therefore AD = BE as corresponding sides of congruent triangles, hence proved.

turn y=6x-5 (explicit) into a recursive equation

Answers

Answer:

[tex]a_1=1\\a_n=a_{n-1}+6[/tex]

Step-by-step explanation:

So to define a recursive equation, you need to find how much each term is increasing or decreasing by. You also need to find the first term. To find the first term you can simply plug in 1 into x: [tex]a_1=6(1)-5 = 6-5 = 1[/tex]. And as you can see the slope is 6, so each term is increasing by 6. So you get the recursive function: [tex]a_1=1\\a_n=a_{n-1}+6[/tex]

PLEASE HELP! You are covering the metal wedge below with a thin layer of high-conducting silver (surface area). The measurements shown are in centimeters. Find the cost of covering the wedge in silver, if silver plating costs $3 for every 2 square centimeters.

Answers

The cost of covering the triangular prism wedge in silver is: $108.

What is the Surface Area of a Triangular Prism?

Surface area = (s1 + s2 + s3)L + bh.

Given the following:

s1 = 10s2 = 8s3 = 6L = 0.5b = 6 h = 8

Plug in the values into the formula

Surface area of the triangular prism metal wedge = (10 + 8 + 6)0.5 + (6)(8)

Surface area of the triangular prism metal wedge = 72 cm²

Cost of covering = 72/2 × 3 = $108

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Given the system
4x + 2y 2z = 10 (A)
2x + 8y + 4z = 32 (B)
30x+12y - 4z = 24 (C)

Answers

The values of the variables are x = -2, y = 6 and z = -3

How to solve by elimination?

The system is given as:

4x + 2y - 2z = 10 (A)

2x + 8y + 4z = 32 (B)

30x + 12y - 4z = 24 (C)

The easiest variable to eliminate is z.

Combine A and B

2[4x + 2y - 2z = 10]

8x + 4y - 4z = 20

+ 2x + 8y + 4z = 32

⇒ 10x + 12y = 52

Combine B and C

2x + 8y + 4z = 32

30x + 12y - 4z = 24

⇒ 32x + 20y = 56

Divide through by 4

8x + 5y = 14

So, we have:

10x + 12y = 52

and

8x + 5y = 14

Multiply 10x + 12y = 52 by 8/10

8/10[10x + 12y = 52]

⇒ 8x + 9.6y = 41.6

Combine 8x + 9.6y = 41.6 and 8x + 5y = 14

8x + 9.6y = 41.6

- [8x + 5y = 14]

⇒ 4.6y = 27.6

Divide

y = 6

Substitute y = 6 in 8x + 5y = 14

8x + 5 * 6 = 14

8x + 30 = 14

Subtract 30

8x = -16

Divide

x = -2

Substitute y = 6 and x = -2 in (A)

4x + 2y - 2z = 10

4(-2) + 2(6) - 2z = 10

-8 + 12- 2z = 10

Evaluate the like terms

-2z = 6

Divide

z = -3

Hence. the values of the variables are x = -2, y = 6 and z = -3

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5.
AMNOP is a square-based pyramid where the volume of pyramid is
392 cm³ and the height is 6 cm. Find the each side of the base area of pyramid.

Answers

The length of each side of the base of the pyramid is 14 cm

Volume of a pyramid

From the question, we are to determine the length of each side of the base of the pyramid

The volume of a square-based pyramid is given by

V = 1/3(b²h)

Where V is the volume

b is the length of the base

and h is the height

From the given information,

V = 392 cm³

h = 6 cm

Putting the parameters into the equation, we get

392 = 1/3(b²× 6)

392 = b² ×2

b² = 392/2

b² = 196

b = √196

b = 14 cm

Hence, the length of each side of the base of the pyramid is 14 cm

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help me pls and if u can explain too.

Answers

Part 1

The gradient of the line is [tex]\frac{11-1}{-3-2}=-2[/tex], so the equation is [tex]y=-2x+5[/tex].

This means the system is

[tex]y=-2x+5\\\\y=ax^2 +b[/tex]

Part 2

Substituting in the coordinates (-3,11) and (2,1) into the equation of the parabola,

[tex]11=9a+b\\\\1=4a+b[/tex]

Subtracting the equations, we get 10=5a, and thus a = 2

Substituting a = 2 back into the system, we get b = -7

Part 3

The equation of the parabola is [tex]y=2x^2 - 7[/tex], and the turning point is at [tex]x=0[/tex]. Therefore, the value of y is -7

hi who know how to do this 3 question?,I will mark brainlest for good answer.​

Answers

Answer:

its answer is 36

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12(x + 4) + 8 = 9
y = 4(x + 4)
y=

Answers

Answer:

y= 1/3

Step-by-step explanation:

12(x + 4) + 8 = 9

12(x + 4) + 8 -8 = 9 -8

12(x + 4) = 1

12(x + 4)/12 = 1/12

(x + 4) = 1/12

y = 4(x + 4)

y= 4(1/12)

y= 4/12

y= 1/3

I need help asap with thissssssssssss

Answers

Answer:

D

Step-by-step explanation:

The domain is the x value which in this case would be the hours of training

URGENT PLEASE ANSWER THESE ASAP

Answers

Answer:

(b) 25 muffins

(c) 38 muffins

Step-by-step explanation:

Given:

A cookie cost $0.80 A muffin costs $1.60buy 200 treatsspend $200 or less

Forming system of linear equations:

muffins (m) + cookies (c) = 200 treats

1.60m + 0.80c = $200

Solve by Substitution:

m + c = 200

1.6m + 0.8c = 200

using m + c = 200, solve for m by subtracting c:

m + c - c = 200 - c

m = 200 - c

we can now plug in m tot he second equation,

1.6(200 - c) + 0.8c = 200

320 - 0.8c = 200

320 - 320 - 0.8c = 200 - 320

-0.8c = -120

-0.8c/-0.8 = -120/-0.8

c = 150

plug c back in to find m,

m = 200 - c

m = 200 - 150

m = 50

(b) if you buy 200 cookies, then how many muffins?

we use this equation as we want to stay in the price limit: 1.6m + 0.8c = 200

c = 200 so 1.6m + 0.8(200) = 200

1.6m + 0.8(200) = 200

1.6m + 160 = 200

1.6m = 200 - 160

1.6m = 40

1.6m/1.6 = 40/1.6

m = 25

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Given that (7-2x),9,(5x+17) are consecutive terms of a geometric progression with common ratio, r>0, find the value of x.

Answers

This are also referred to as exponential sequence.  The common ratio if r > 0 is 2

Geometric sequence

This are also referred to as exponential sequence. Given the following sequence

(7-2x),9,(5x+17)

If they are in geometric progression, hence;

9/7-2x = 5x+17/9

Cross multiply

7-2x(5x+17) = 9(9)

Expand

35x+119-10x²-34x = 81

-10x²+x+119-81=0
10x²-x-38 = 0

Factorize

10x²-20x +19x-38 = 0

10x(x-2)+19(x-2)= 0

x - 2 = 0

x = 2

Hence the common ratio if r > 0 is 2

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Suppose you have a valid argument with a false conclusion. Given this information, what do you know about the truth value of the argument's premises? The premises must all be false. At least one premise must be false. There must be at least one true premise and at least one false premise. The premises may be any combination of true and false. The premises must all be true.

Answers

Suppose you have a valid argument with a false conclusion. Given this information, what do you know about the truth value of the argument's premises? The premises must all be false. At least one premise must be false. There must be at least one true premise and at least one false premise. The premises may be any combination of true and false. The premises must all be true.

"The argument may be either valid or invalid" When trying to determine the validity of an argument in logic, the truth of a premise is a non-factor. Logic is concerned about whether or not an argument would effectively transfer truth from its premises to the conclusion if the premises were true.

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