Answer:
a. Y = X1 + X2 = 1(Heads) + 1(Heads) = 2
Z = X2 + X3 = 1(Heads) + 1(Heads) = 2
The joint probability mass function of (Y, Z) can be determined by multiplying the individual probabilities:
P(Y, Z) = P(Y) * P(Z)
P(Y, Z) = (2/8) * (2/8) = 1/16
b. Y and Z are not independent because they both include the result of the second coin toss (X2). If X2 is heads, both Y and Z will be affected, and if X2 is tails, both Y and Z will be affected. Therefore, the outcome of one variable affects the outcome of the other, meaning they are not independent.
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Determine the sixth term of the
sequence
A(n) = -2.5^(n-1)
in words: (A of n is equal to negative two
times 5 raised to the (n-1) power)
The 6th term of the sequence is -97.65625
How to determine the 6th term of the sequenceFrom the question, we have the following parameters that can be used in our computation:
A(n) = -2.5^(n-1)
In the sixth term, we have
n = 6
Substitute the known values in the above equation, so, we have the following representation
A(6) = -2.5^(6-1)
Evaluate
A(6) = -97.65625
Hence, the 6th term is -97.65625
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Mai and Andre found an old, brass bottle that contained a
magical genie. They freed the genie, and it offered them
each a magical $1 coin as thanks.
. The magic coin turned into 2 coins on the first day.
. The 2 coins turned into 4 coins on the second day.
. The 4 coins turned into 8 coins on the third
This doubling pattern continued for 28 days.
Mai was trying to calculate how many coins she would have and remembered that instead
of writing 1.2.2.2.2.2.2 for the number of coins on the 6th day, she could just
write 26.
Answer:
Mai is correct. We can use exponential notation to represent the number of coins each day. Let's call the number of coins on the first day "1". Then the number of coins on each subsequent day is twice the number of coins on the previous day. So we have:
Day 1: 1
Day 2: 2 = 2^1
Day 3: 4 = 2^2
Day 4: 8 = 2^3
...
Day n: 2^(n-1)
To find the number of coins Mai has on the 6th day, we substitute n = 6 into the formula for the number of coins:
Day 6: 2^(6-1) = 2^5 = 32
So Mai has 32 coins on the 6th day. Writing out the product of 2's (1.2.2.2.2.2.2) is equivalent to writing 2^6 = 32.
To find out how many coins Mai has after 28 days, we substitute n = 28 into the formula for the number of coins:
Day 28: 2^(28-1) = 2^27 = 134,217,728
So after 28 days, Mai has 134,217,728 coins.
Complete the statement.
A die has 15 sides shown as follows: 9 triangles, 4 circles, and 2 squares. The probabaty of rolling a triangle is out of 15 or or %
P
The probability of rolling a triangle is 9 out of 15, or
(Type integers or decimals.)
4
or
ww
√i V
More
The probability of rolling a triangle is 9 out of 15, or 60%.
What is probability?Its essential vision is that an individual will nearly certainly happen.
Then the probability is given as,
P = (Favorable event) / (Total event)
As per the given data:
Total sides is a die = 15
triangles = 9
circles = 4
squares = 2
The probability of rolling a triangle is 9 out of 15, or:
For probability in % = (Favorable outcomes/Total outcomes) × 100
= (9/15) × 100
= 60%
Hence, The probability of rolling a triangle is 9 out of 15, or 60%.
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Question 2 Factor the following expression completely by pulling out the 15x^(7)+3x^(4)+21
The completely factored expression by pulling out the 15x^(7)+3x^(4)+21 is 3(5x^(7)+x^(4)+7).
What is factored expression?A factored expression is an algebraic expression that has been broken down into its prime factors. This is usually done to simplify the expression and make it easier to solve for a particular variable or to factor out a common factor from multiple terms.
To factor the given expression, we need to find the greatest common factor (GCF) of the terms and then divide each term by the GCF to get the simplified expression.
The GCF of 15x^(7), 3x^(4), and 21 is 3. So, we can factor out 3 from each term to get the simplified expression:
15x^(7)+3x^(4)+21 = 3(5x^(7)+x^(4)+7)
Therefore, the completely factored expression is 3(5x^(7)+x^(4)+7).
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Rewrite the equation by completing the square - 4x^2 +20x +25 =0
Answer:
[tex]\left(x-\frac{5}{2}\right)^2=\frac{25}{2}[/tex]
Step-by-step explanation:
I am not completely sure if you just wanted me to write it in square form, so I will show the process of writing it in square form and how to find the solution.
[tex]-4x^2+20x=-25[/tex] start by moving 25 to the right side
[tex]\frac{-4x^2+20x}{-4}=\frac{-25}{-4}[/tex] divide both sides by -4
= [tex]x^2-5x=\frac{25}{4}[/tex]
Now we rewrite the equation in the form [tex]\:x^2+2ax+a^2[/tex]
= [tex]x^2-5x+\left(-\frac{5}{2}\right)^2=\frac{25}{2}[/tex] apply perfect square formula: [tex]\left(a-b\right)^2=a^2-2ab+b^2[/tex]
= [tex]\left(x-\frac{5}{2}\right)^2=\frac{25}{2}[/tex] -- square form
Solutions to the quadratic equation:
Possible solutions: [tex]x=\frac{5}{\sqrt{2}}+\frac{5}{2}[/tex] and [tex]\:x=-\frac{5}{\sqrt{2}}+\frac{5}{2}[/tex]
help me do this please
[tex]help1[/tex]
The angles of a triangle equal 180 degrees when added together. We will use this logic to solve all three for x. We will use inverse operations and combine like terms to solve.
[30] Answer: x = 36
Step-by-step explanation:
2x + 2x + x = 180
5x = 180
x = 36
[31] Answer: x = 9
Step-by-step explanation:
* the little box represents 90 degrees
7x + 3x + 90 = 180
10x = 90
x = 9
[32] Answer: x = 45
Step-by-step explanation:
2x + x + x = 180
4x = 180
x = 45
What is the percent of increase from 53.5 to 96.3?
Answer:
80%
Step-by-step explanation:
96.3 - 53.5 = 42.8
42.8 / 53.5 = 0.8
0.8 × 100 = 80%
From a full container of dry cells, 325 dry cells are placed in the stockroom, 45 dry cells are placed on the shelf in the showroom, and 18, 25 , 30,24 , and 6 dry cells are sold to customers. How many dry cells are taken from the full container?
The amount of dry cells that are taken from the full container is 473.
To find the total number of dry cells taken from the full container, we need to add up the number of dry cells placed in the stockroom, on the shelf, and sold to customers. We can use the following equation:
Total dry cells taken = Dry cells in stockroom + Dry cells on shelf + Dry cells sold to customers
Plugging in the given values, we get:
Total dry cells taken = 325 + 45 + 18 + 25 + 30 + 24 + 6
Using the order of operations, we can simplify the equation:
Total dry cells taken = 325 + 45 + 18 + 25 + 30 + 24 + 6
Total dry cells taken = 370 + 18 + 25 + 30 + 24 + 6
Total dry cells taken = 388 + 25 + 30 + 24 + 6
Total dry cells taken = 413 + 30 + 24 + 6
Total dry cells taken = 443 + 24 + 6
Total dry cells taken = 467 + 6
Total dry cells taken = 473
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A pair of kids and a pair of adults decided to compete in a three-legged race. The kids got to start 16 meters ahead of the adults, since they had shorter legs. When they were told to start, the kids hobbled forward at a rate of 1 meter per second, and the adults hobbled after them at a rate of 3 meters per second. Soon they were side-by-side. How far did the adults go? How long did that take?
Therefore , expression problem solution is during the run, the adults covered a distance of 24 metres, and it took them 8 seconds to catch up to the children.
Explain expression.There is a need for mathematical operations like multiplying, splitting, combining, and now even deleting. If they were combined, it would be said that: A mathematical formula, some data, and an equation A declaration of truth is composed of values, elements, and mathematical operations like additions, subtractions, missteps, algebraic formulas, and divisions. It is possible to evaluate and analyse words and phrases.
Here,
Distance is determined by rate and duration.
for the distances that children and adults travel, two equations should be made up:
=> (d - 16) = 1t (for the youngsters) (for the kids)
=> d = 3t (for the males) (for the adults)
where "t" represents the amount of time that has elapsed since the competition began.
We can set the distances between the children and adults to be equal because we know that they were side-by-side at some time during the race:
=> d - 16 = 3t - 16
When we simplify this solution, we obtain:
=> d = 3t
When we add this to the prior solution, we obtain:
=> 3t - 16 = 1t
To solve for "t," we obtain:
=> t = 8 sec.
Now that we know how far the grownups travelled:
D=3t=3x8=24 metres.
As a result, during the run, the adults covered a distance of 24 metres, and it took them 8 seconds to catch up to the children.
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The question is in the screenshot:
sin(30°) = ½
Sin(30°) have the value of √1/2 which gives ½
evaluate xy^-4 with positive exponents
By answering the above question, we may state that Hence, [tex]xy{(-4)}[/tex]is x exponents divided by y raised to the power of 4.
what are exponents?The mathematical process of exponentiation, frequently referred to as "b raised to the nth power," is symbolised by the symbol bn and includes two numbers: a base number, b, and an exponent, or power, n. Exponents demonstrate the number of times that a number has been multiplied by itself. For example, 2-3 (written as 23) means: 2 x 2 x 2 = 8. 2 + 3 does not equal 6, nor does 23. Remember that an integer whose power is one is equal to itself. Exponents can be used as a way to express large numbers as powers. Therefore, the exponent is the measurement that shows how many times a number has been multiplied by itself. For instance, multiplying 6 by 4 results in the values 6 x 6 x 6. .
Considering that the phrase is:
[tex]xy^{-4}[/tex]
We may simplify the case when x and y both have positive exponents as follows:
[tex]xy^{(-4)} = x / y^4[/tex]
This is due to the negative exponents rule, which claims that y(-n) = 1/yn, which indicates that [tex]y(-n) = 1/yn.[/tex]
Hence, [tex]xy{(-4)}[/tex]is x divided by y raised to the power of 4.
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write a possible recursive rule and find a7 for (2,3,8,19,46)
an = 2*an-1 + an-2 is the sequence's recursive rule, and the seventh term is 268.
What is the recursive rule?A formula that explains how to move from one word in a sequence to the next is known as a recursive rule for a sequence.
The variable typically serves as a symbol for the concept of a number.
In other words, takes on the values 1, 2, 3, etc. for the first, second, third, etc. terms.
A recursive sequence is one in which terms are defined by reference to one or more previously defined terms.
The recursive formula an+1=an+d can be used to find the (n+1)th term of an arithmetic series if you know the nth term and the common difference, d.
So, we know that:
2 = 2 * 1 + 0
3 = 2 * 1 + 1
8 = 2 * 3 + 2
19 = 2 * 8 + 3
46 = 2 * 19 + 8
The sequence's nth term is as follows after the preceding sequence:
a7 = 2*an-1 + a7 - 2
For, a7:
a7 = 2*a7-1+a7-2
a7 = 2*a6+a5
a7 = 2*a6+46
a6 = 2*a5+a4
a7 = 2*(2*46+19)+46
a7 = 268
Therefore, an = 2*an-1 + an-2 is the sequence's recursive rule, and the seventh term is 268.
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Keith paid $37 for 4 pounds of pistachios and 1 pound of cashews. Tracey paid $48 for 3 pounds of pistachios and 3 pound of cashews. Find the cost of a pound of pistachios and the cost of a pound of c
Based on the given information, the cost of a pound of pistachios and a pound of cashews is $7.875 and $5.50, respectively.
To find the cost of a pound of pistachios and the cost of a pound of cashews, we can use a system of equations.
Let's let P represent the cost of a pound of pistachios and C represent the cost of a pound of cashews.
Then we can write two equations based on the information given:
4P + 1C = 37
3P + 3C = 48
Now we can use the elimination method to solve for one of the variables.
Let's multiply the first equation by -3 to eliminate the P variable:
-12P - 3C = -111
3P + 3C = 48
Adding these two equations together gives us:
-8P + 0C = -63
Simplifying gives us:
P = 63/8
This means that the cost for a pound of pistachios is $63/8 or $7.875.
Substitute the value of P to any of the two equations so we can have the value of C.
4(63/8) + 1C = 37
C = 11/2 = 5.5
Therefore, the cost of a pound of pistachios is $7.875 while the cost of a pound of cashews is $5.50.
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You deposit $2000 in an account with 3% annual compound interest. Complete the following, assuming you make no additional deposits or withdrawals. How fast will the account be growing (in dollars per year) 11 years from now?
It will be growing by $____ per year.
The account will be growing by $741.87 per year 11 years from now.
To find the answer, we need to use the formula for compound interest, which is A = P(1 + r/n)^(nt), where A is the final amount, P is the principal amount, r is the annual interest rate, n is the number of times interest is compounded per year, and t is the number of years.
In this case, P = $2000, r = 0.03, n = 1, and t = 11. Plugging these values into the formula gives us:
A = $2000(1 + 0.03/1)^(1*11)
A = $2000(1.03)^11
A = $2741.87
To find out how fast the account will be growing 11 years from now, we need to subtract the principal amount from the final amount:
$2741.87 - $2000 = $741.87
Therefore, the account will be growing by $741.87 per year 11 years from now.
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x-3y
2x+4y=10
Substitutes
Use triangle PQR for questions 2-4. What are the values of the trigonometric ratios for R in this triangle?
2. What is the value for sin R? Enter your answer as a fraction.
3. What is the value for cos R? Enter your answer as a fraction.
4. What is the value for tan R? Enter your answer as a fraction
Step-by-step explanation:
remember, sine is the up/down leg, cosine is the left/right leg.
the Hypotenuse is the radius of the circle around the trigonometric triangle.
so,
sin(R) = 5/13
cos(R) = 12/13
tan(R) = sin(R)/cos(R) = 5/13 / 12/13 = (5×13)/(13×12) =
= 5/12
A rental car company charges $61.79 per day to rent a car and $0.13 for every mile driven. Tallulah wants to rent a car, knowing that: She plans to drive 50 miles. She has at most $230 to spend. What is the maximum number of days that Tallulah can rent the car while staying within her budget?
The maximum number of days she can drive the car is approximately 4 days.
How to find the maximum days she can ride the car?A rental car company charges $61.79 per day to rent a car and $0.13 for every mile driven.
She plans to drive 50 miles. She has at most $230 to spend.
Therefore, the maximum number of days that Tallulah can rent the car while staying within her budget can be computed as follows:
Using equations,
y = 0.13a + 61.79b
where
a = number of miles drivenb = number of daysTherefore, she has a budget of 230 dollars and she wants to ride for 50 miles.
230 = 0.13(50) + 61.79b
230 - 6.5 = 61.79b
223.5 = 61.79b
b = 223.5 / 61.79
b = 3.61709014404
Therefore,
b = 4 days
Hence, she can ride maximum of 4 days.
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[1] Language arts IS soience Q. Sodal studies Hecommendations T.8 Convert autemary and metric units uing preportions swo Which proportion could you use to convert 5 kilograms to grams? (1,000 grams )/(1 kilogram )=( ? grams )/(5 kilograms ) (10 grams )/(1 kilogram )=(7 grams )/(5 kilograms ) (1)
We can use the proportion (1000 grams )/(1 kilogram ) = (x grams )/(5 kilograms ) to convert 5 kilograms into grams.
The right proportion to use to convert 5 kilograms to grams is (1,000 grams)/(1 kilogram) = ( x grams)/(5 kilograms). This is because there are 1,000 grams in 1 kilogram, so we can use this ratio to find the number of grams in 5 kilograms. To solve for the unknown value, we can cross multiply and then divide.
The proportion is solved as:
So, the answer is 5,000 grams. Therefore, 5 kilograms is equal to 5,000 grams.
In conclusion, the correct proportion is (1000 grams )/(1 kilogram ) = (x grams )/(5 kilograms ).
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Does the equation y = 3/4 x represent a proportional relationship? Explain how you know.
Yes, the equation y = 3/4(x) represent a proportional relationship because its line passes through the origin.
What is a proportional relationship?In Mathematics, a proportional relationship is a type of relationship that produces equivalent ratios and it can be modeled or represented by the following mathematical expression:
y = kx
Where:
k is the constant of proportionality.y and x represent the variables in a proportional relationship.Generally speaking, the graph of any proportional relationship such as the linear equation is characterized by a straight line that passes through all the points and the origin, which is denoted by the ordered pair (0, 0).
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UVWXYGFEDC. What is mZW?
V
W
mZW =
U
64⁰
X
104°
0
C
1130
G
136⁰
E
F
Step-by-step explanation:
when 2 shapes are similar, then that means (among few other things) that both have the same angles at their vertexes.
by looking at the relative sizes of the sides, we can map which vertex of one correlates to which vertex (and angle) in the other.
D -> X
C -> Y
G -> U
F -> V
E -> W
so, the angle W = angle E = 136°.
(c) 5longleftrightarrow (7) What is the coefficient of the x^(2) term in the expression 5x-4x^(2)+2 ?
So, the coefficient of the x^(2) term in the expression 5x-4x^(2)+2 is -4.
The coefficient of the x^(2) term in the expression 5x-4x^(2)+2 is -4.
A coefficient is the number that is multiplied by a variable in an expression. In this case, the x^(2) term is -4x^(2), so the coefficient is -4.
To find the coefficient of a specific term in an expression, you can simply look at the number that is directly in front of the variable and its exponent. For example, in the term 5x, the coefficient is 5, and in the term 2, the coefficient is 2 (since there is no variable, the coefficient is simply the number itself).
In the expression 5x-4x^(2)+2, the x^(2) term is -4x^(2), so the coefficient is -4. This means that the x^(2) term is being multiplied by -4 in the expression.
So, the coefficient of the x^(2) term in the expression 5x-4x^(2)+2 is -4.
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What is the value of 12÷13
?
Answer:
Step-by-step explanation:
12/13=0.92307692307
Standard Form Instructions: Write the polynomial expression in Standard Form -6-7x^(2)+8x^(5) Standard Form:
Standard form of a polynomial expression is a way of writing the expression in descending order of the powers of the variable, starting with the highest power and ending with the constant. In this case, the polynomial expression is - 6 - 7x ^ (2) + 8x ^ (5).
In standard form, this expression can be written as 8x ^ (5) -7x ^ (2) - 6. This expression indicates that 8 is the coefficient of the highest power, x ^ (5). The coefficient of the second highest power, x ^ (2) is -7, and the coefficient of the constant, the term with no variable, is -6.
Standard form is useful for simplifying polynomial expressions, as it helps to clearly illustrate the coefficients of each term. It is also useful for graphing polynomials, as the order of the terms can be clearly seen.
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Today only, a table is being sold for $285. This is 76% of its regular price. What was the price yesterday?
Answer:
Step-by-step explanation:
Answer:Price of the table yesterday is x.
Price of the table today is $513.
$513 is 76% of yesterday's price x. 76% can be also written down as 76 divided by 100 (percentage) or 76/100 = 0.76.
Formula we can set up now is: x= 513 / 0.76 (To get the price of yersterday's table we need to divide the price of today's table with percentage in decimal form).
x= 675
The price of yesterday's table was $675 since 76% of that price (675 times 0.76) equals 513 dollars.
Step-by-step explanation:
The values in each data set vary over time, even though the same measurand is being measured. What is your interpretation of why the 11 measurements in the first data set vary? what is your interpretation of why the 1001 measurements in the second data set vary? what is your interpretation of why the 1001 measurements in the third data set vary?
The interpretation of the 1001 measurements in the third set of data vary due to reasons are as follow,
Measurement error, Random variation and Sampling error.
Measurement error: The measurand being measured may have inherent variability, but measurement error can also contribute to variation in the data set.
Random variation: Even if the same measurand is being measured under the same conditions, there may be random fluctuations in the system or the environment that can cause variation in the data.
Sampling error: If the 11 measurements were not taken at random from the population of interest, then the variation could be due to sampling error.
For the 1001 measurements in the second and third data sets, some possible explanations for the variation could be measurement error, systematic variation, changes in the measurand and Sampling error.
Thus, variation in data can have many different causes, and it is important to carefully consider the context and specific factors that may be contributing to the variation when interpreting the results.
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someone help me out rq
The calculated system of inequalities shown in the graph of inequalities is x > -2 and y < 4
How to determine the system of inequalities?A system of inequalities is a set of two or more inequalities involving one or more variables.
The variables can take on different values that satisfy the given inequalities simultaneously.
The solution to the system is the set of values of the variables that satisfy all the inequalities in the system. A system of inequalities can be represented graphically as a region in a coordinate plane where each inequality defines a boundary line or curve. The region that satisfies all the inequalities is the intersection of the regions defined by each inequality.Inequalities is used to show the unequal comparison of numbers and variables using signs like >, <, ≥, ≤By the above analysis, the inequalities shown in the graph is x > -2 and y < 4
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given the figure below with the provided measurements, what is PQ?
The requried measure of the PQ in the triangle PQT is 16 in.
What are Similar triangles?Similar triangles are those triangles that have similar properties,i.e. angles and proportionality of sides.
Here,
A figure of triangles has been shown, ΔPQT and ΔORS.
We have to determine the measure of side PQ.
Since the given triangle is similar to one another, we can apply the property of proportionality between the similar triangles. By which:
PR/PQ = RS/QT
PQ + 4 / PQ = 10/8
8PQ + 32 = 10PQ
2 PQ = 32
PQ = 16 in
Thus, the requried measure of the PQ in the triangle PQT is 16 in.
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Graph :StartFraction x squared Over 49 EndFraction + StartFraction (y + 1) squared Over 4 EndFraction = 1
The graph of the equation x^2/49 + (y + 1)^2/4 = 1 is added as an attachment
How to graph the equationThe expression that represents the function in words is given as
StartFraction x squared Over 49 EndFraction + StartFraction (y + 1) squared Over 4 EndFraction = 1
Express the equation properly
So, we have
x^2/49 + (y + 1)^2/4 = 1
The above equation is an ellipse
Next, we plot the graph on a coordinate plane using a graphing tool
See attachment for the graph of the equation
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A right circular cylinder has the dimensions shown below.
r = 17.2 yd
h = 45.3 yd
What is the volume of the cylinder? Use 3.14 for π.
Round to the nearest tenth and include correct units.
Show all your work.
The volume of the cylinder is 42080.87 cubic yd
What is a Cylinder?Cylinder is a 3-dimensional solid shape that consists of two identical and parallel bases linked by a curved surface.It has two curved edges, one curved surface, and two flat faces.
Volume of a cylinder = π * r^2 * h
Where π = 3.14
r = 17.2 td
h = 45.3 yd
Volume of a cylinder = 3.14 * (17.2)^2 * 45.3
Volume = 3.14 * 295.84 * 45.3
Volume = 42080.87 cubic yard
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If 3x-y=12, what is the value of 8x over 2y?
A.) 2^12
B.) 4^4
C.) 8^2
D.) The value cannot be determined from the information given.
Step-by-step explanation:
We can solve for x in terms of y from the equation 3x - y = 12 as follows:
3x - y = 12
3x = y + 12
x = (y + 12)/3
Similarly, we can solve for y in terms of x:
3x - y = 12
-y = -3x + 12
y = 3x - 12
Now, we can substitute these expressions for x and y into the expression 8x/2y to get:
8x/2y = 4x/y
Substituting (y + 12)/3 for x, we get:
4x/y = 4((y + 12)/3)/y = 4(y + 12)/3y
Simplifying the numerator, we get:
4(y + 12) = 4y + 48
Substituting 3x - 12 for y, we get:
4y + 48 = 4(3x - 12) + 48 = 12x
Therefore, 8x/2y = 4x/y = 12x/4y = 12x/(3x - 12)
We cannot simplify this expression further without additional information. Therefore, the answer is (D) The value cannot be determined from the information given.