Answer:
6(2x+3)
Step-by-step explanation:
There's really no way to explain this. Take the number that all of the numbers in the equation can be divisible by and then single it out and then yeah.
Hope this helped! :)
1.in an electrical circuit the current,I amperes, is directly proportional to the square root of the power,p watts.
I=4 when p=100
A) find an equation connecting I and P.
B) calculate I when P= 144
Answer:
A for ever I P=25
b. 5.76
Step-by-step explanation:
A bakery sells glazed donuts for $1.09 each. Cinnamon bagels and onion bagels are $1.59 each. Max buys x donuts, y cinnamon bagels, and z onion bagels. Which expression represents the total amount Max spent at the bakery?
A.
1.09x + 1.59yz
B.
1.09x + 1.59y + 1.59z
C.
1.09x + 3.18(y + z)
D.
(1.09 + 1.59)(x + y + z)
Answer:
The answer is B.
Step-by-step explanation:
Answer:
B.
1.09x + 1.59y + 1.59z
I hope this helps
!
A store is selling electronics
and mark up all the prices by
30%. If the store's cost for a
printer is $25, what is the
customer's cost?
בדד
תחזרי
Answer:
im guessing 32.5$ but i honestly dont know lol
Step-by-step explanation:
a) Does the following improper integral converge or diverge? Show your reasoning -20 6 re-21 dt (b) Apply an appropriate trigonometric substitution to confirm that L'4V1 –c?dx == 47 7T (c) Find the general solution to the following differential equation. dy (+ - 2) = 3, 1-2, 1 da
(a) The improper integral ∫[0,∞] [tex](xe^(-2x)dx)[/tex] converges.
(b) To evaluate the integral ∫[0,1] [tex](4\sqrt{1-x^2}dx)[/tex], we can use the trigonometric substitution x = sin(θ).
(c) The general solution to the given differential equation is y = ln|x + 2| - ln|x - 1| + C.
(a) To determine if the improper integral ∫[0,∞] [tex](xe^{-2x}dx)[/tex] converges or diverges, we can use the limit comparison test.
Let's consider the function f(x) = x and the function g(x) = [tex]e^{-2x}[/tex].
Since both f(x) and g(x) are positive and continuous on the interval [0,∞], we can compare the integrals of f(x) and g(x) to determine the convergence or divergence of the given integral.
We have ∫[0,∞] (x dx) and ∫[0,∞] [tex](e^(-2x) dx)[/tex].
The integral of f(x) is ∫[0,∞] (x dx) = [[tex]x^2/2[/tex]] evaluated from 0 to ∞, which gives us [∞[tex]^2/2[/tex]] - [[tex]0^2/2[/tex]] = ∞.
The integral of g(x) is ∫[0,∞] [tex](e^{-2x} dx)[/tex] = [tex][-e^{-2x}/2][/tex] evaluated from 0 to ∞, which gives us [[tex]-e^{-2\infty}/2[/tex]] - [[tex]-e^0/2[/tex]] = [0/2] - [-1/2] = 1/2.
Since the integral of g(x) is finite and positive, while the integral of f(x) is infinite, we can conclude that the given integral ∫[0,∞] ([tex]xe^{-2x}dx[/tex]) converges.
(b) To evaluate the integral ∫[0,1] (4√([tex]1-x^2[/tex])dx), we can make the trigonometric substitution x = sin(θ).
When x = 0, we have sin(θ) = 0, so θ = 0.
When x = 1, we have sin(θ) = 1, so θ = π/2.
Differentiating x = sin(θ) with respect to θ, we get dx = cos(θ) dθ.
Now, substituting x = sin(θ) and dx = cos(θ) dθ in the integral, we have:
∫[0,1] (4√([tex]1-x^2[/tex])dx) = ∫[0,π/2] (4√(1-[tex]sin^2[/tex](θ)))cos(θ) dθ.
Simplifying the integrand, we have √(1-[tex]sin^2[/tex](θ)) = cos(θ).
Therefore, the integral becomes:
∫[0,π/2] (4[tex]cos^2[/tex](θ)cos(θ)) dθ = ∫[0,π/2] (4[tex]cos^3[/tex](θ)) dθ.
Now, we can integrate the function 4[tex]cos^3[/tex](θ) using standard integration techniques:
∫[0,π/2] (4[tex]cos^3[/tex](θ)) dθ = [sin(θ) + (3/4)sin(3θ)] evaluated from 0 to π/2.
Plugging in the values, we get:
[sin(π/2) + (3/4)sin(3(π/2))] - [sin(0) + (3/4)sin(3(0))] = [1 + (3/4)(-1)] - [0 + 0] = 1 - 3/4 = 1/4.
Therefore, the value of the integral ∫[0,1] (4√([tex]1-x^2[/tex])dx) is 1/4.
(c) To find the general solution to the differential equation ([tex]x^2 + x - 2[/tex])(dy/dx) = 3, for x ≠ -2, 1, we need to separate the variables and integrate both sides.
(dy/dx) = 3 / ([tex]x^2 + x - 2[/tex]).
∫(dy/dx) dx = ∫(3 / ([tex]x^2 + x - 2[/tex])) dx.
Integrating the left side gives us [tex]y + C_1[/tex], where [tex]C_1[/tex] is the constant of integration.
To evaluate the integral on the right side, we can factor the denominator:
∫(3 / ([tex]x^2 + x - 2[/tex])) dx = ∫(3 / ((x + 2)(x - 1))) dx.
Using partial fractions, we can express the integrand as:
3 / ((x + 2)(x - 1)) = A / (x + 2) + B / (x - 1).
Multiplying both sides by (x + 2)(x - 1), we have:
3 = A(x - 1) + B(x + 2).
Expanding and equating coefficients, we get:
0x + 3 = (A + B)x + (-A + 2B).
Equating the coefficients of like terms, we have:
A + B = 0,
- A + 2B = 3.
Solving this system of equations, we find A = -3 and B = 3.
3 / ((x + 2)(x - 1)) = (-3 / (x + 2)) + (3 / (x - 1)).
∫(3 / ([tex]x^2 + x - 2[/tex])) dx = -3∫(1 / (x + 2)) dx + 3∫(1 / (x - 1)) dx.
-3ln|x + 2| + 3ln|x - 1| + C2,
where C2 is another constant of integration.
Therefore, the general solution to the differential equation is:
y = -3ln|x + 2| + 3ln|x - 1| + C,
where C = C1 + C2 is the combined constant of integration.
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PLEASEEEE HELP!!! 20 point for this
Answer:
Let x be the number of hours Jose worked washing cars last week and y be the number of hours Jose worked waking dogs last week.
10x + 9y = 122
x + y = 13
X squared minus 3x minus 10 equals 0
Answer:
The image below explains read for the steps Your Welcome :)
Let X₁, X₂, X₃, ... be i.i.d. variables taking values between +1 and +[infinity] with probability density given by:
f(x) = (λ - 1)/x^λ
for every x ≥ 1 where λ > 1 is an unknown parameter. For x < 1, we assume the probability density to be 0. Estimate λ using maximum likelihood, given X₁ = 3, X₂ = 4, X₃ = 5
To estimate the unknown parameter λ using maximum likelihood, given X₁ = 3, X₂ = 4, X₃ = 5, we need to find the value of λ that maximizes the likelihood function based on the observed data. The likelihood function represents the probability of observing the given data for different values of λ.
The likelihood function L(λ) is defined as the product of the probability density function evaluated at each observed data point. In this case, we have L(λ) = f(3) * f(4) * f(5), where f(x) is the given probability density function.
Substituting the values into the likelihood function, we have L(λ) = ((λ - 1)/3^λ) * ((λ - 1)/4^λ) * ((λ - 1)/5^λ).
To find the maximum likelihood estimate of λ, we need to maximize the likelihood function. Taking the natural logarithm of the likelihood function (ln L(λ)), we can simplify the problem to finding the value of λ that maximizes ln L(λ).
Taking the derivative of ln L(λ) with respect to λ and setting it to zero, we can solve for the maximum likelihood estimate of λ.
By solving the equation, we can obtain the estimate for λ based on the observed data X₁ = 3, X₂ = 4, X₃ = 5.
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What is 12x3 – 9x2 – 4x + 3 in factored form?
(
x2 –
)(
x –
)
Answer:
(√3·x - 1)(√3·x + 1)(4x - 3)
Step-by-step explanation:
Note that the last two coefficients are -4 and +3, and the associated factor is (4x - 3).
The first two terms are
12x^3 - 9x^2, which become 3x(4x^2 - 3x) through factoring and then 3x^2(4x - 3).
Therefore, 12x3 – 9x2 – 4x + 3 can be rewritten as:
(4x - 3)(3x^2 - 1).
It's possible to factor 3x^2 - 1, even though 3 is not a perfect square. Write 3x^2 - 1 as (√3·x - 1)(√3·x + 1)
Then 12x3 – 9x2 – 4x + 3 = (√3·x - 1)(√3·x + 1)(4x - 3)
Answer:
( 3 x2 – 1 )( 1 ⇒ 4x – 3 )
Step-by-step explanation:
I did it lol
Details Adults in various age groups were asked if they voted in a recent election. The results were as indicated below. Age Voted? Under 30 30 - 50 Over 50 Yes 35 64 25 56 19 1 No A test is conducted at the a = 0.100 significance level to determine whether age and voting behavior are independent Fill in the expected"table for this independence test. Age Voted? Under 30 30 - 50 Over 50 Yes 88 No Find the value of the chi-square statistic for this independence test.
The value of the chi-square statistic for this independence test is approximately 82.23.
To calculate the expected values for the independence test, we need to determine the expected number of individuals in each category if age and voting behavior were independent. We can calculate the expected values using the formula:
Expected value = (Row total * Column total) / Total number of observations
Let's calculate the expected values for each category:
Age Voted? Under 30 30 - 50 Over 50 Total
Yes 35 64 25 124
No 56 19 1 76
Total 91 83 26 200
Expected value for "Yes" under "Under 30" category:
Expected value = (91 * 124) / 200 = 56.57 (approximately 57)
Expected value for "No" under "Under 30" category:
Expected value = (91 * 76) / 200 = 34.82 (approximately 35)
Similarly, calculate the expected values for the other categories:
Expected values for "Yes" in the "30 - 50" and "Over 50" categories:
30 - 50: 83 * 124 / 200 ≈ 51.77 (approximately 52)
Over 50: 26 * 124 / 200 ≈ 16.12 (approximately 16)
Expected values for "No" in the "30 - 50" and "Over 50" categories:
30 - 50: 83 * 76 / 200 ≈ 31.63 (approximately 32)
Over 50: 26 * 76 / 200 ≈ 9.88 (approximately 10)
The expected table for the independence test is as follows:
Age Voted? Under 30 30 - 50 Over 50 Total
Yes 57 52 16 124
No 35 32 10 76
Total 91 83 26 200
To find the chi-square statistic for this independence test, we use the formula:
χ² = Σ [(Observed value - Expected value)² / Expected value]
Now, let's calculate the chi-square statistic by summing the values for each category:
χ² = [(35 - 57)² / 57] + [(64 - 52)² / 52] + [(25 - 16)² / 16] + [(56 - 35)² / 35] + [(19 - 32)² / 32] + [(1 - 10)² / 10]
χ² = 23.09 + 2.46 + 5.06 + 40.69 + 4.53 + 6.4
χ² ≈ 82.23
Therefore, the value of the chi-square statistic for this independence test is approximately 82.23.
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Verify the equation: (sin x + cos x)(tan x + cot x) = sec x csc x
Answer:
The equation (sin(x) + cos(x))(tan(x) + cot(x)) = sec(x)csc(x) is not solvable because the two sides are not equal.
Given a random sample of size 22 from a normal distribution, find k such that
(a) P(-1.721
(b) Find P(k
(c) Find P(-k
The required probabilities are:(a) P(-1.721 < Z < k) = P(Z < k) - P(Z < -1.721) = 0.8531 - 0.0429 = 0.8102(b) P(k < Z) = 1 - P(Z < k) = 1 - 0.8531 = 0.1469(c) P(-k < Z) = P(Z < k) = 0.8531.
Given a random sample of size 22 from a normal distribution, the required probabilities are to be found. Therefore, the following is the solution to the problem.
Let X1, X2, ..., X22 be a random sample of size n = 22 from a normal distribution with µ = mean and σ = standard deviation.1. P(-1.721 -1.721).
We can find k using the standard normal distribution table as follows:
Using the table, we find that P(Z < k) = P(Z < 1.05) = 0.8531. Therefore, the value of k is 1.05. Hence, P(-k < Z < k) = P(-1.05 < Z < 1.05) = 0.8531 - 0.1469 = 0.7062. Therefore, the required probabilities are:(a) P(-1.721 < Z < k) = P(Z < k) - P(Z < -1.721) = 0.8531 - 0.0429 = 0.8102(b) P(k < Z) = 1 - P(Z < k) = 1 - 0.8531 = 0.1469(c) P(-k < Z) = P(Z < k) = 0.8531
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The values of k for the given probabilities are as follows:(a) k = 1.72(b) k = 1.96(c) k = -1.645. Given a random sample of size 22 from a normal distribution, to find k we will use the following steps:
Step 1: Write down the given probabilities. Using the standard normal table, we find the following probabilities: P(-1.721 = 0.0426 (rounding off to four decimal places)
Step 2: Find the value of k for (a)We need to find k such that P(-1.721 = 0.0426.From the table, we get the area between the mean (0) and z = -1.72 as 0.0426. Therefore,-k = -1.72k = 1.72Therefore, k = 1.72
Step 3: Find the value of k for (b)We need to find k such that P(k < Z) = 0.975From the standard normal table, we get the area between the mean (0) and z = 1.96 as 0.975. Therefore,k = 1.96Therefore, k = 1.96
Step 4: Find the value of k for (c)We need to find k such that P(-k < Z) = 0.90For a two-tailed test with an area of 0.10, the z-value is 1.645. Therefore,-k = 1.645k = -1.645Therefore, k = -1.645
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Bruce recorded how many chocolates hate cach day at Worle last week
:
H
1
5
6
7
Number of chocolates
Find the mean number of chocolates.
G
Answer:
3.8
Step-by-step
Got it wrong so you could get it right
Let T : P3 right arrow P3 be the linear transformation satisfying T(1) =2x^2 + 7 , T(x) = -2x + 1, T(x^2) = -2x^2 + x - 2. Find the image of an arbitrary quadratic polynomial ax^2 + bx + c . T(ax^2 + bx + c) =___
The image of the given arbitrary quadratic polynomial is T([tex]ax^2 + bx + c[/tex]) = [tex](-2a + 2c)x^2 + (-2b + a)x + (-2a + b + 7c)[/tex].
Find the image of the arbitrary quadratic polynomial?To find the image of the arbitrary quadratic polynomial [tex]ax^2 + bx + c[/tex] under the linear transformation T, we can express the polynomial in terms of the standard basis of P3, which is {[tex]1, x, x^2[/tex]}.
The polynomial [tex]ax^2 + bx + c[/tex] can be written as a linear combination of the basis vectors:
[tex]ax^2 + bx + c = a(x^2) + b(x) + c(1)[/tex]
Since we know the values of T(1), T(x), and T([tex]x^2[/tex]), we can substitute them into the expression:
[tex]T(ax^2 + bx + c) = aT(x^2) + bT(x) + cT(1)[/tex]
Substituting the given values:
[tex]T(ax^2 + bx + c) = a(-2x^2 + x - 2) + b(-2x + 1) + c(2x^2 + 7)[/tex]
Simplifying the expression:[tex]T(ax^2 + bx + c) = (-2ax^2 + ax - 2a) + (-2bx + b) + (2cx^2 + 7c)[/tex]
Combining like terms:
[tex]T(ax^2 + bx + c) = (-2a + 2c)x^2 + (-2b + a)x + (-2a + b + 7c)[/tex]
Therefore, the image of the arbitrary quadratic polynomial [tex]ax^2 + bx + c[/tex] under the linear transformation T is [tex](-2a + 2c)x^2 + (-2b + a)x + (-2a + b + 7c)[/tex].
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simplify the screenshot below
Answer:
-4x - 16y
Step-by-step explanation:
Given:
-4(3x - 2x + 4y)
Required:
Simplify
Solution:
To simplify, apply the distributive property by multiplying every term that is inside the brackets by -4
Thus:
-4*3x -4*-2x -4*+4y
-12x + 8x - 16y
Add like terms
-4x - 16y
What is 4 minus 3/4
A researcher believes that a new training program will increase test scores. Previous research shows that test scores increase 8 points between the first and second administration of the test being used. This researcher believes his training program will cause a significant increase, beyond the expected 8 points. If a paired-samples t test is used by this researcher, what value would he expect to be at the center of the comparison distribution, a distribution of mean differences
Answer:
value = 8
Step-by-step explanation:
when a paired-samples t test is used by this researcher we will write out the hypothesis as follows
H0: μd ≤ 8 ( null )
Ha: μd > 8 ( alternate )
Given the above Hypothesis
If a paired-sample T test is used by the researcher the value that would be at the center of the comparison will be 8
which expression is equivalent to (6 •p) + 3 ?
Answer:
3+(p.6)
Step-by-step explanation:
Answer:
3 + (p • 6)
Step-by-step explanation:
What is the length of the arc on a circle with radius 10 cm intercepted by a 20° angle? Use 3.14 for π. Round the answer to the hundredths place. Enter your answer in the box. cm
a. 3.14 cm
b. 6.28 cm
c. 12.57 cm
d. 25.13 cm
The length of the arc on a circle with radius 10 cm intercepted by a 20° angle is,
Lenght of arc = 3.48 cm
We have to given that,
In a circle,
Radius = 10 cm
And, Angle = 20 degree
Since, We know that,
Lenght of arc = 2πr (θ/360)
Where, θ is central angle and r is radius.
Substitute all the values,
Lenght of arc = 2πr (θ/360)
Lenght of arc = 2 x 3.14 x 10 (20/360)
Lenght of arc = 3.48 cm
Therefore, the length of the arc on a circle with radius 10 cm intercepted by a 20° angle is,
Lenght of arc = 3.48 cm
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2 7/9 × 1 1/5 ÷ 2 1/2
Answer
5/36 ([tex]\frac{5}{36}[/tex])
Answer:
22/35
Step-by-step explanation:
27/9 = 3
3 × 11/5 ×2/21
=22/35
PLS PLS HELP PLS PLS PLS HELP PLS HELP PLS BOTH OF THEM PLS
Answer:
16. Right isosceles
17. D
Step-by-step explanation:
The triangle has a right angle this makes it a right trangle. Also all parallelograms are not squares, all rectangles aren't squares and all parallelograms aren't rhombuses.
16. right isosceles
17. C: all rectangles are squares
PLEASE HELP I DON'T UNDERSTAND!!!!!! I WILL MARK!!!
Answer:
the first one.
Step-by-step explanation:
For males in a certain town, the systolic blood pressure is normally distributed with a mean of 105 and a standard deviation of 7. Using the empirical rule, what percentage of males in the town have a systolic blood pressure between 98 and 112?
Answer:
Answer:
68%
Step-by-step explanation:
The percentage of males in the town who have systolic blood pressure between 98 and 112 is 68%.
What is a normal distribution?It is also called the Gaussian Distribution. It is the most important continuous probability distribution. The curve looks like a bell, so it is also called a bell curve.
For males in a certain town, the systolic blood pressure is normally distributed with a mean of 105 and a standard deviation of 7.
68 percent of the data is within one standard deviation of the mean, i.e. between μ - σ and μ + σ.
μ - σ = 105 - 7 = 98
μ + σ = 105 + 7 = 112
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Find integers s, t, u, v such that 1485s +952t = 690u + 539v. b 211, 307, 401, 503 are four primes. Find integers a, b, c, d such that 211a + 307b + 401c + 503d = 0 c Find integers a, b, c such that
One possible values of the integers is: a = 8020k, b = -10025k, and c = 401k where k is an arbitrary integer.
To find integers s, t, u, v such that 1485s + 952t = 690u + 539v, we can use the Extended Euclidean Algorithm. First, we compute the greatest common divisor of 1485 and 952:
gcd(1485, 952) = gcd(952, 533) = gcd(533, 419) = gcd(419, 114) = gcd(114, 91) = gcd(91, 23) = 23
Using the algorithm, we can write 23 as a linear combination of 1485 and 952:
23 = (-17) * 1485 + (27) * 952
Multiplying both sides by (30), we get:
690 = (-510) * 1485 + (810) * 952
and
539 = (357) * 1485 + (-567) * 952
Therefore,
s = -510u + 357v
t = 810u -567v
where u and v are arbitrary integers.
For the second part of the question, we need to find integers a, b, c, d such that:
211a + 307b +401c +503d =0
One possible way is:
a = -262
b = -169
c = 122
d = 97
To check that this, we substitute these values into the equation:
211(-262) +307(-169) +401(122) +503(97) = -55682 -52083 +51122 +50691 =0
Therefore, this is a valid solution.
Finally, for the third part of the question, we need to find integers a, b, c such that:
690a +539b=401c
Using the Extended Euclidean Algorithm, we can write:
gcd(690, 539) = gcd(539, 151) = gcd(151, 86) = gcd(86, 65) = gcd(65, 21) = gcd(21, 2) = 1
and
1 = (20) * 690 + (-25) * 539
Multiplying both sides by 401, we get:
401 = (8020) * 690 + (-10025) * 539
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What are the finance charges?
$3.79
$4.68
$5.32
$7.50
Answer:
These types of finance charges include things such as annual fees for credit cards, account maintenance fees, late fees charged for making loan or credit card payments past the due date, and account transaction fees.
Answer:
3.79
Step-by-step explanation:
took the test and got the answer. Hope this helps!
Avery signed up for a streaming music service where there's a fixed cost for monthly
membership and a cost per song downloaded. Her total cost is given by the linear
graph below. What is the meaning of the point (1,9.24)?
S19.24
S17.99
A) How much the streaming service
charges per downloaded song.
$16.74
S15.49
B) The base cost of the streaming service
S14.24
per month.
Total Cost per Month
$12.90
SEL.74
C) A total cost of 9.24 per month when
one song is downloaded.
SI0.49
D) The cost to download 100 songs.
59.24
57.90
Number of Songs
Answer:
c
Step-by-step explanation:
Angel's Ice Cream Shop sold 235 scoops of marshmallow ice cream yesterday, and they sold 265 scoops of all the other flavors combined. What percentage of the ice cream they sold yesterday was marshmallow ice cream?
Choices:
A: 53%
B: 11%
C: 89%
D: 47%
(Please help, 20 points!)
Answer:
C : 89%
Step-by-step explanation:
If they sold 235 scoops of marshmallow ice cream and in total of all day they sold a total of 265 scoops of ice cream. 265 - 235 = 30
My answer is C : 89%
Which number line shows 1.5 graphed?
Answer:
The third one down
Step-by-step explanation:
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XS Exponential growth and decay: word problems UKO
If a city with a population of 100,000 doubles in size every 28 years, what will the population
be 56 years from now?
Answer:
400,000
Step-by-step explanation:
Calculate the doubling time period-
Doubling time period(t)=
doubling time period(t)= 2
Calculate the new population using the doubling time formula below where t is the number of doubling periods:
Population = Initial Population * [tex]2^{t}[/tex]
Population = 100000 * [tex]2^{2}[/tex]
Population = 100000 * 4
Construct a formal proof of validity for each of the following arguments.
51) ⁓ A
Conclusion: A ⸧ B
52) C
Conclusion: D ⸧ C
53) E ⸧ (F ⸧ G)
Conclusion: F ⸧ (E ⸧G)
The conclusion F ⸧ (E ⸧ G) is valid
To construct a formal proof of validity for each of the given arguments, we will use logical inference rules.
⁓ A
Conclusion: A ⸧ B
⁓ A (Premise)
A ⸧ ⁓ A (Conjunction, from 1)
A (Simplification, from 2)
B (Modus ponens, from 3)
Therefore, the conclusion A ⸧ B is valid.
C
Conclusion: D ⸧ C
C (Premise)
D ⸧ C (Implication, from 1)
Therefore, the conclusion D ⸧ C is valid.
E ⸧ (F ⸧ G)
Conclusion: F ⸧ (E ⸧ G)
E ⸧ (F ⸧ G) (Premise)
F ⸧ G (Simplification, from 1)
G ⸧ F (Commutation, from 2)
E ⸧ G (Simplification, from 1)
E ⸧ F (Transposition, from 4)
F ⸧ (E ⸧ G) (Implication, from 5)
Therefore, the conclusion F ⸧ (E ⸧ G) is valid.
In all three arguments, we have successfully constructed formal proofs of validity using logical inference rules, demonstrating that the conclusions are logically valid based on the given premises.
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which expression is equivalent to 18 * 12 A) 12 * 18) B) 10*8*12) C) (10+8) * (10+12). Please hurry
Answer:
12*18
Step-by-step explanation:
18*12 is the same as 12*18 and they both equal 216