Need help with this problem 5

Answer: The solution to a system of equations in two variables represents the values of the variables that satisfy both equations simultaneously.

To check which equations might make up the system with a solution of (5,-19), we can substitute x = 5 and y = -19 into each equation and see if they are both satisfied.

Substituting x = 5 and y = -19 into the first equation, we get:

y = 2x - 23

-19 = 2(5) - 23

-19 = -13

This is not true, so the first equation is not part of the system.

Substituting x = 5 and y = -19 into the second equation, we get:

y = x - 17

-19 = 5 - 17

-19 = -12

This is not true, so the second equation is not part of the system.

Substituting x = 5 and y = -19 into the third equation, we get:

y = -7x + 16

-19 = -7(5) + 16

-19 = -19

This is true, so the third equation is one of the equations in the system.

Substituting x = 5 and y = -19 into the fourth equation, we get:

y = -21 - 9x

-19 = -21 - 9(5)

-19 = -64

This is not true, so the fourth equation is not part of the system.

Substituting x = 5 and y = -19 into the fifth equation, we get:

y = -3x - 6

-19 = -3(5) - 6

-19 = -21

This is not true, so the fifth equation is not part of the system.

Therefore, one possible system of equations with a solution of (5,-19) is:

y = -7x + 16

We would need another equation to form a complete system with a unique solution.

Step-by-step explanation:

The simplification by expressing fractional exponents instead of radicals is a^1/2. b^1/2 or  (ab)^(1/2)

The expression in radical form was been provided as √ab and this is been expected from use to express it ionform of fractional exponent form.

√ab

note that;

√a = a^1/2

√ab = √a * √b

By utilixzing the properties of square root function, then we can have the expressions as ;

√ab = √a √b

√ab = a^1/2 * b^1/2

√ab =a^1/2. b^1/2

=a^1/2. b^1/2 or  (ab)^(1/2)

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To make 16 cookies it need 1 cup of sugar.

Problem solving questions are questions that require critical thinking and analytical skills to solve a particular issue or challenge, often in a systematic and logical way.

To make 1 cookie, you need 1 1/4 cups of sugar ÷ 20 cookies = 1/16 cups of sugar.

To make 16 cookies, you need 16 cookies x 1/16 cups of sugar per cookie = 1 cup of sugar.

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The center of the circle lies on the x-axis.
The radius of the circle is 3 units. 

The radius of this circle is the same as the radius of the circle whose equation is x² + y² = 9.

The standard equation of a circle is expressed as: Centre is (-g, -f)radius = √g²+f²-CGiven a circle whose equation is Get the centre of the circle2gx = -2x2g = -2g = -1Similarly, 2fy = 0f = 0Centre = (-(-1), 0) = (1, 0)This shows that the center of the circle lies on the x-axisr = radius = √g²+f²-Cradius = √1²+0²-(-8)radius =√9 = 3 unitsThe radius of the circle is 3 units.

 For the circle x² + y² = 9, the radius is expressed as:r² = 9r = 3 units Hence the radius of this circle is the same as the radius of the circle whose equation is x² + y² = 9.

"To find how many newspapers are in one pile if 80 newspapers are divided into 5 piles, we need to divide the total number of newspapers (80) by the number of piles (5):

80 / 5 = 16

Therefore, there are 16 newspapers in each pile if 80 newspapers are divided into 5 piles." (ChatGPT, 2023)

The linear model is Population = 92 + 2.35x and the exponential model is Population= 92(1.0187)ˣ.

An exponential model implies that the change in y is proportionate to its present value, whereas a linear model assumes that the change in y is constant for each unit change in the explanatory variable (x). To put it another way, an exponential model assumes a varying rate of change, whereas a linear model implies a constant rate of change.

Let us suppose number of years = x.

Given that, the U.S. population in 1910 was 92 million people. In 1990, the population was 280 million.

From 1910 to 1990 is a period of 80 years, the increase in population over this period is 280 million - 92 million = 188 million.

Therefore, the average annual increase in population is 188 million / 80 years = 2.35 million.

Thus, the linear model is:

Population = 92 + 2.35x

The exponential model is:

The population grew from 92 million in 1910 to 280 million in 1990, a factor of 280/92 = 3.0435.

The period of growth is 80 years, so the annual growth rate can be calculated as:

rate = (3.0435)^(1/80) - 1 = 0.0187 or 1.87%

Population= 92(1.0187)ˣ

Hence, the linear model is Population = 92 + 2.35x and the exponential model is Population= 92(1.0187)ˣ.

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Answer:

(x - 5)² = 18

Step-by-step explanation:

x² - 10x + 7 = 0 ( subtract 7 from both sides )

x² - 10x = - 7

using the method of completing the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(- 5)x + 25 = - 7 + 25

(x - 5)² = 18 ← in the form (x - p)² = q

It will take Lush Gardens Co. 3 years and 3 months to settle the loan if it makes payments of $1,600 at the end of every month.

First, we need to find the amount of the loan.

Amount of loan = Total cost of the truck - Down payment

Amount of loan = $54,000 - $5,940 = $48,060

Next, we need to find the monthly interest rate. Since the interest is compounded semi-annually, we first need to find the semi-annual interest rate:

Semi-annual interest rate = 4.46% / 2 = 2.23%

Then, we can find the monthly interest rate using the formula:

Plugging in the numbers:

Monthly interest rate = (1 + 0.0223)^(1/12) - 1 = 0.001845

Now we can use the formula for the loan payment:

Loan payment = Monthly interest rate * Loan amount / (1 - (1 + Monthly interest rate)^(-n))

Where n is the number of months.

Plugging in the numbers:

$1,600 = 0.001845 * $48,060 / (1 - (1 + 0.001845)^(-n))

Solving for n using a financial calculator :

n = 38.98 months

Rounding up to the next payment period (which is 39 months), we get:

n = 3 years, 3 months

Therefore, it will take Lush Gardens Co. 3 years and 3 months to settle the loan if it makes payments of $1,600 at the end of every month.

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The unknown length in the rectangle is ? = 8cm

We we want to find the unknown length.

First, if we look just at the pink and yellow rectangles we can see that these have a combined area of:

A = 12cm² + 18cm²

A = 30cm²

And we know that one side measures 6cm, then the length of AD is:

AD*6cm = 30cm²

AD = 30cm²/6cm

AD = 5cm

Now, the yellow and purple rectangles have a combined area of:

A = 18cm² + 22cm² = 40cm²

Then we can write:

?*AD = 40cm²

?*5cm = 40cm²

? = 40cm²/5cm

? = 8cm

That is the unknown lenght.

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Answer:

Step-by-step explanation:

y=-6

y=-10

y=-2

Answer:

Step-by-step explanation:

I can provide you with the steps to solve the simultaneous equations y=5-x and y=x+1 using the given graphs.

a) To draw the graph of y=x+1 on the same grid, we can plot the points where x=0 and x=5, and connect them with a straight line. When x=0, y=1 and when x=5, y=6, so the line passes through (0,1) and (5,6).

b) To solve the simultaneous equations y=5-x and y=x+1, we can look for the point where the two graphs intersect on the same grid. This point represents the values of x and y that satisfy both equations simultaneously.

From the first equation, we know that when x=0, y=5, and when x=5, y=0. From the second equation, we know that when x=0, y=1, and when x=5, y=6.

By looking at the graphs, we can see that the two lines intersect at the point where x=4 and y=1. Therefore, the simultaneous solution of the equations is x=4 and y=1.

Answer:

We can use trigonometry to solve the problem. Let's call the height of the tower "h". Then we can use the tangent function to find "h":

tan(85°) = h/80

Multiplying both sides by 80, we get:

h = 80 tan(85°) ≈ 884.2 ft

Rounding to the nearest tenth, the height of the Eiffel Tower is approximately 884.2 ft.

Step-by-step explanation:

Answer:

m = 2

Step-by-step explanation:

Slope = rise/run or (y2 - y1) / (x2 - x1)

Points (5, 12) (7, 16)

We see the y increase by 4 and the x increase by 2, so the slope is

m = 4/2 = 2

So, the slope is 2

Therefore, the value of 'a' that satisfies the equation is a = 2/7.

A relationship between two expressions in mathematics is known as an equation, and it is written as an equality on both sides of the equal to sign. An equation is, for instance, 3y = 16.

To solve for 'a' in the equation 10a-2=4a-1a, we need to simplify and isolate the variable on one side of the equation.

10a - 2 = 4a - 1a

First, we can simplify the right side of the equation by combining the like terms:

10a - 2 = 3a

Next, we can isolate the variable 'a' on one side of the equation by subtracting 3a from both sides:

10a - 2 - 3a = 0

Simplifying the left side of the equation:

7a - 2 = 0

7a = 2

a = 2/7

Therefore, the value of 'a' that satisfies the equation is a = 2/7.

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Answer:

Step-by-step explanation:

o find a linear function that can be used to predict the number of nations participating x years after 1988, we can use linear regression analysis. Using a spreadsheet program or calculator with linear regression capabilities, we obtain:

y = 1.9632x + 51.3276

where y is the predicted number of nations participating and x is the number of years after 1988.

To predict those years in which more than 100 nations will participate, we can substitute y = 100 into the linear function and solve for x:

100 = 1.9632x + 51.3276

48.6724 = 1.9632x

x ≈ 24.8

Therefore, more than 100 nations will participate in the Winter Games approximately 24.8 years after 1988, or in the year 2013.

To calculate the monthly payment, we can use the formula for a fixed-payment loan:

P = (Pv * r) / (1 - (1 + r)^(-n))

Where:

Pv = present value of the loan

r = monthly interest rate

n = total number of payments

P = fixed monthly payment

a. To find the monthly payment, we need to first calculate the monthly interest rate and total number of payments:

Monthly interest rate = APR / 12 = 0.12 / 12 = 0.01

Total number of payments = 15 years * 12 months/year = 180

Plugging these values into the formula, we get:

P = (25000 * 0.01) / (1 - (1 + 0.01)^(-180)) = $285.41 per month

Therefore, the monthly payment is $285.41.

b. To determine the total amount paid over the term of the loan, we can simply multiply the monthly payment by the total number of payments:

Total amount paid = monthly payment * total number of payments

Total amount paid = $285.41 * 180 = $51,373.80

Therefore, the total amount paid over the term of the loan is $51,373.80.

c. To find the percentage of the total amount paid that is applied toward the principal and interest, we can use the amortization schedule. An amortization schedule breaks down each payment into its principal and interest components. Using a loan calculator or spreadsheet, we can generate the following schedule:   in file  attachment

From the table in file  attachment, we can see that the total principal paid over the term of the loan is $25,000 (the initial loan amount) plus $281.12, or $25,281.12. To find the percentage of the total amount paid that is applied toward the principal, we can divide the total principal by the total amount paid and multiply by 100:

Percentage of total amount paid applied toward principal = (Total principal / Total amount paid) * 100

Percentage of total amount paid applied toward principal = ($25,281.12 / $51,373.80) * 100 = 49.20%

Therefore, 49.20% of the total amount paid is applied toward the principal, while the remaining 50.80% is paid for interest.

The value of b is solved using square root is found to be b = 2√ac.

The section of a quadratic formula following the square root symbol, b²-4ac, is the discriminant. If we have two solutions, single solution, or none at all, the discriminant informs us.

The given equation is:

b²- 4ac = 0

Separating unknown value from the equation:

b² = 4ac

Taking square root both side.

√b² = √4ac

Simplifying

b = 2√ac

Thus, the value of b is solved using square root is found to be b = 2√ac.

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Therefore , the solution of the given problem of function comes out to be f[g(x)] = 3x² - 2 is the formula for the function f[g(x)].

The mathematics programme covers a wide range of topics, including mathematics, numbers, but also their subsets, along with building, construction, and the both real and fictional geographic locations. A work covers the connections between different variable elements that all work together to produce the same result. A utility is made up of several distinctive components that, when combined, produce specific results for each input.

Here,

We must first assess g(x) in order to determine f[g(x)], and then we can use the outcome to determine f[g(x)].

=> g(x) = x² + 1

When we substitute g(x) for f(x), we obtain:

=> f[g(x)] = f(x² + 1)

=> 3(x² + 1) - 5 = 3x² + 3 - 5

=> 3x² - 2

Therefore, f[g(x)] = 3x² - 2 is the formula for the function f[g(x)].

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Answer:

i don’t know sorry

Step-by-step explanation:

nothing

Answer:

5.3333

Step-by-step explanation:

We want to divide 16 by 3, and it will be 5.333333....

The 3 is repeating in this question, but to the 4th decimal place it will be 5.3333.

Answer:

5.3333

Step-by-step explanation:

A fraction is a fragment of a whole number, used to define parts of a whole. The whole can be a whole object or many different objects. The number at the top of the line is called the numerator, whereas the bottom is called the denominator.

To convert a fraction to a decimal, you divide the numerator by the denominator. In this case, it is 16 divided by 3.

To round this number to 4 decimal places, you look at the fifth digit after the decimal point (which is 3). Because this digit is less than 5, you don't need to round the fourth number up, and the final result is 5.3333.

Therefore, 16 divided by 3 is approximately 5.3333 when rounded to 4 decimal places.

1. The prοbability that yοu draw a red marble 7/24

2. The prοbability οf chοοsing exactly οne οf each cοlοr is 63/253

3. The prοbability that yοu draw 5 green marbles in a rοw is 0.0057

Prοbability is a branch οf mathematics in which the chances οf experiments οccurring are calculated. It is by means οf a prοbability, fοr example, that we can knοw frοm the chance οf getting heads οr tails in the launch οf a cοin tο the chance οf errοr in research.

1. The prοbability οf drawing a red marble is given by the number οf red marbles divided by the tοtal number οf marbles in the jar:

P(red) = 7/(7+9+8) = 7/24

2. The prοbability οf chοοsing exactly οne οf each cοlοr, if yοu pick 3 marbles frοm the jar, can be fοund using the hypergeοmetric distributiοn. The tοtal number οf ways tο chοοse 3 marbles frοm 24 is:

C(24,3) = 2024

The number οf ways tο chοοse οne οf each cοlοr is:

C(7,1) * C(9,1) * C(8,1) = 798 = 504

Therefοre, the prοbability οf chοοsing exactly οne οf each cοlοr is:

P(1 οf each cοlοr) = 504/2024 = 63/253

3. The prοbability οf drawing 5 green marbles in a rοw withοut replacement can be fοund as fοllοws. Therefοre, the prοbability can be calculated as:

P(5 green in a rοw) = (9/24) * (8/23) * (7/22) * (6/21) * (5/20) = 0.0057 (rοunded tο fοur decimal places)

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Answer:

The reduced echelon form of the given matrix B is [ 1 0 0 -5 | 0 ], [ 0 1 0 3 | 0 ], and [ 0 0 1 0 | 0 ]. The parametric description of the set of solutions for the given system of linear equations is { [5x4, -3x4, 0, x4] | x4 ∈ R }.

Step-by-step explanation:

Using row operations to reduce the matrix B to reduced row echelon form, we have:

[ 1 3 -5 4 | 0 ]

[ 1 4 -8 7 | 0 ]

[-3 -7 9 -6 | 0 ]

R2 - R1 -> R2

R3 + 3R1 -> R3

[ 1 3 -5 4 | 0 ]

[ 0 1 -3 3 | 0 ]

[ 0 2 4 6 | 0 ]

R1 - 3R2 -> R1

R3 - 2R2 -> R3

[ 1 0 4 -5 | 0 ]

[ 0 1 -3 3 | 0 ]

[ 0 0 10 0 | 0 ]

R3/10 -> R3

[ 1 0 4 -5 | 0 ]

[ 0 1 -3 3 | 0 ]

[ 0 0 1 0 | 0 ]

R2 + 3R3 -> R2

R1 - 4R3 -> R1

R2 + 3R3 -> R3

[ 1 0 0 -5 | 0 ]

[ 0 1 0 3 | 0 ]

[ 0 0 1 0 | 0 ]

Therefore, the reduced echelon form of the matrix B is:

[ 1 0 0 -5 | 0 ]

[ 0 1 0 3 | 0 ]

[ 0 0 1 0 | 0 ]

asterisk

can you make it step by step easy to understand

Certainly! Here are the steps to find the reduced row echelon form of the matrix B = [1, 3, -5, 4, 1, 4, -8, 7, -3, -7, 9, -6]:

Write the matrix in augmented form, with a vertical line separating the coefficients from the constant terms.

[ 1 3 -5 4 | 0 ]

[ 1 4 -8 7 | 0 ]

[-3 -7 9 -6 | 0 ]

Use row operations to transform the matrix into row echelon form. The goal is to create zeros below the leading entries (the first nonzero element) in each row. Here are the steps:

a. Subtract the first row from the second row, and subtract 3 times the first row from the third row:

[ 1 3 -5 4 | 0 ]

[ 0 1 -3 3 | 0 ]

[ 0 2 4 6 | 0 ]

b. Subtract 3 times the second row from the first row, and subtract 2 times the second row from the third row:

[ 1 0 4 -5 | 0 ]

[ 0 1 -3 3 | 0 ]

[ 0 0 10 0 | 0 ]

c. Divide the third row by 10 to create a leading 1 in the third row:

[ 1 0 4 -5 | 0 ]

[ 0 1 -3 3 | 0 ]

[ 0 0 1 0 | 0 ]

Use row operations to transform the matrix into reduced row echelon form. The goal is to create leading 1's in each row, and zeros above and below the leading 1's. Here are the steps:

a. Subtract 4 times the third row from the first row, and subtract 3 times the third row from the second row:

[ 1 0 0 -5 | 0 ]

[ 0 1 0 3 | 0 ]

[ 0 0 1 0 | 0 ]

The matrix is now in reduced row echelon form. The leftmost nonzero entry in each nonzero row is 1, and each leading 1 is the only nonzero entry in its column. The rows are arranged so that all rows with all zeros are at the bottom of the matrix.

Therefore, the reduced row echelon form of the matrix B is:

[ 1 0 0 -5 | 0 ]

[ 0 1 0 3 | 0 ]

[ 0 0 1 0 | 0 ]

For (b):

From the reduced echelon form obtained in part (a), we can write the system of equations as:

x1 + 0x2 + 4x3 = -5

0x1 + x2 - 3x3 = 3

0x1 + 0x2 + x3 = 0

We can solve for the basic variables (x1, x2, x3) in terms of the free variable(s):

x1 = -5 - 4x3

x2 = 3 + 3x3

x3 = free

Therefore, the general solution to the system of equations is:

x = [-5 - 4x3, 3 + 3x3, x3]

where x3 is any real number, since it is the free variable. This is the parametric description of the set of solutions. We can also write this solution set in set-builder notation as:

{ [-5 - 4x3, 3 + 3x3, x3] | x3 ∈ R }

This means that any vector in the solution set can be obtained by choosing a value for the free variable x3 and plugging it into the expressions for x1, x2, and x3. For example, if we choose x3 = 0, we get the solution (x1, x2, x3) = (-5, 3, 0). If we choose x3 = 1, we get the solution (x1, x2, x3) = (-9, 6, 1), and so on.

Hope this helps! I'm sorry if it doesn't. If you need more help, ask me! :]

The answer is 3 and 1

Step-by-step explanation:

Given : 2x ^ 2 - 8x + 6 = 0

To Find: x

Solution:

2x ^ 2 - 8x + 6 = 0

2(x ^ 2 - 4x + 3) = 0

x ^ 2 - 4x + 3 = 0

x ^ 2 - x - 3x + 3 = 0

x(x - 1) - 3(x - 1) = 0

(x - 3)(x - 1) = 0

x - 3 = 0

x = 3

x - 1 = 0

x = 1

Thus the solution are 3 and 1

Step-by-step explanation:

4a.

as we can see in the table, if we have 1 processor and add a second one, we save 30 minutes (61 - 31 = 30).

4b.

if you solved 3. and filled the table correctly, you see that with 240 processors we need 1 minute + 60/240 = 1 1/4 = 1.25 minutes.

if we add additional 240 processors, we get 480 processors, and we need 1 minute + 60/480 = 1 1/8 = 1.125 minutes.

that means we save 1/8 minute (1 1/4 - 1 1/8 = 1/8) with doubling the amount of processors. that is 7.5 seconds.

4c.

the answer always depends on the circumstances.

in fast processes 7.5 seconds can be a long time, and it might be worth the effort to save that amount of time (like in real time processing as with industrial robotics, simulating and controlling trains or a space flight).

but for asynchronous calculations of certain numbers it might not matter, if the result is available 7.5 seconds earlier or later, and the extra effort is not worth it.

Answer: x = 8

Step-by-step explanation: Let 'x' be the number we are looking for.

As per the question, equation will be : x^2 - 40 = 3x

                                                                x^2 - 3x - 40 = 0

Factor the equation. Or quadratic equation formula can also be used.

Factoring -

                    x^2 - 3x - 40 = 0

                    x^2 - 8x + 5x - 40 = 0

                     x(x-8) + 5( x-8) = 0

                       (x+5) ( x-8)  = 0

       x+5=0           ,        x-8 =0

        x = -5             ,       x = 8

As we need to find the positive solution, x = 8 is the answer.

VERIFICATION -

                 =   x^2 - 40

                 =   ( 8 )^2 - 40

                  = 64 - 40  

                  =  24  

And 3 times 8 is also 24.

Therefore, if we subtract 40 from the square of 8, the result will be 3 times the number (which is 8).

Answer:

[tex]\boxed{\textsf{y = 3}}[/tex]

Step-by-step explanation:

[tex]\textsf{We are asked to solve for y.}[/tex]

[tex]\textsf{We should begin by \underline{simplifying} the equation.}[/tex]

[tex]\textsf{First, begin by dividing 750 from \underline{both sides} of the equation.}\\[/tex]

[tex]\Large\underline{\textsf{Divide:}}[/tex]

[tex]\mathtt{\frac{162000}{750} = \frac{750 \times 6^y}{750} .}[/tex]

[tex]\mathtt{216=6^y}[/tex]

[tex]\Large\underline{\textsf{Continue Dividing By 6:}}[/tex]

[tex]\mathtt{\frac{216}{6} = 36 (^{y-1})}[/tex]

[tex]\mathtt{\frac{36}{6} = 6 (^{y-2} )}[/tex]

[tex]\Large\underline{\textsf{Identify y:}}[/tex]

[tex]\mathtt{6^1 = 6. \ 6^{1+2} = 216. \ (6^3)}[/tex]

[tex]\boxed{\textsf{y = 3}}[/tex]

In the Venn Diagram, it is verified that 11-bit word 10011011100 has the 15-bit Hamming code 100110111001010.

What is a Venn Diagram?

In order to solve problems based on the sets, we can use a Venn diagram to depict the logical relationship between sets and their components. Although other closed figures like squares may be used, a Venn diagram commonly uses intersecting and non-intersecting circles to indicate the relationship between sets.

To verify that the 11-bit word 10011011100 has the 15-bit Hamming code 100110111001010 for the Venn Diagram given, we need to check that the parity bits in the Hamming code are calculated correctly.

The Hamming code has three parity bits, calculated based on the positions of the 1's in the code word.

Using the rules for calculating the parity bits, we get -

Parity bit 1: covers all bit positions that have an odd index (i.e., 1, 3, 5, 7, 9, 11, 13, 15).

Calculated as the XOR of these bit positions: 1 XOR 0 XOR 0 XOR 1 XOR 1 XOR 0 XOR 0 XOR 1 = 0.

Parity bit 2: covers all bit positions that have a "2" bit in their binary representation (i.e., 2, 3, 6, 7, 10, 11, 14, 15).

Calculated as the XOR of these bit positions: 0 XOR 0 XOR 1 XOR 1 XOR 1 XOR 0 XOR 1 XOR 0 = 0.

Parity bit 3: covers all bit positions that have a "4" bit in their binary representation (i.e., 4, 5, 6, 7, 12, 13, 14, 15).

Calculated as the XOR of these bit positions: 1 XOR 1 XOR 1 XOR 1 XOR 0 XOR 1 XOR 0 XOR 0 = 1.

Therefore, the 15-bit Hamming code for the 11-bit word 10011011100 is:

100110111001010

which matches the given code.

Thus, we have verified that the 11-bit word 10011011100 has the 15-bit Hamming code 100110111001010.

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The logarithmic form of the equation a^3 = y is log_a(y) = 3

A logarithmic equation is an equation that involves the logarithm of one or more variables.

From the question, we have the following parameters that can be used in our computation:

a^3 = y

Take the logarithm of both sides of the equation

So, we have

3log(a) = log(y)

Divide both side by log(a)

So, we have

3 = log_a(y)

Rewrte as

log_a(y) = 3

Hence, the equation is (b) 3 = log_a(y)

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Answer:C

Step-by-step explanation:

you see x=-3 is match for y=2

Answer:

2

Step-by-step explanation:

Look for where the line crosses x=-3. It crosses at y=2. so the answer is the third, 2