Please Help Me. How do you form an augmented matrix from the system of linear equations and solve.

This is Algebra 2. I need help solving questions 6.3 & 6.4. I've read the instructions and I am not understanding what their asking me.

Please Help Me. How Do You Form An Augmented Matrix From The System Of Linear Equations And Solve.This

Answers

Answer 1

Answer:

  6.3  (x, y) = (3, 1)

  6.4  (x, y) = (-4, 2)

Step-by-step explanation:

An augmented matrix in this context is an array of the coefficients in the equation. For example, the equation x -2y = 3 can be represented by the row of numbers 1 -2 3. When writing the matrix by hand, we usually just separate the elements in a row using blank space. Some calculators require a comma or other character between matrix elements. The entire array is enclosed in square brackets.

An augmented matrix may have a vertical line separating the square matrix of coefficients from the rightmost column of constants.

Many graphing calculators have functions available for entering and solving linear equations in this form.

__

6.3 The augmented matrix is ...

[tex]\left[\begin{array}{cc|c}2&3&9\\1&-4&-1\end{array}\right][/tex]

This array can be used to solve the system of equations using "row operations." The idea is that any row can be multiplied by any number, and any row can be added to any other row (multiplied by some number or not). So, the same techniques used to solve a system by elimination can be used here.

We can, for example, subtract twice the second row from the first. Then we have ...

[tex]\left[\begin{array}{cc|c}2-2(1)&3-2(-4)&9-2(-1)\\1&-4&-1\end{array}\right]\\\\\left[\begin{array}{cc|c}0&11&11\\1&-4&-1\end{array}\right] \quad\text{simplified}\\\\\left[\begin{array}{cc|c}0&1&1\\1&-4&-1\end{array}\right] \quad\text{first row divided by 11}\\\\\left[\begin{array}{cc|c}0&1&1\\1+4(0)&-4+4(1)&-1+4(1)\end{array}\right] \quad\text{4 times row 1 added to row 2}\\\\\left[\begin{array}{cc|c}0&1&1\\1&0&3\end{array}\right] \quad\text{simplified}[/tex]

When we turn this last matrix back into equations, we get ...

  0x +y = 1

  1x + 0y = 3

That is, the solution is (x, y) = (3, 1).

__

6.4 The augmented matrix is ...

[tex]\left[\begin{array}{cc|c}4&5&-6\\3&2&-8\end{array}\right][/tex]

Let's start the solution of this one by dividing the first row by 4.

[tex]\left[\begin{array}{ccc}1&\frac{5}{4}&-\frac{3}{2}\\3&2&-8\end{array}\right] \\\\\left[\begin{array}{ccc}1&\frac{5}{4}&-\frac{3}{2}\\3-3(1)&2-3(\frac{5}{4})&-8-3(-\frac{3}{2})\end{array}\right] \quad\text{row 2 minus 3 times row 1}\\\\\left[\begin{array}{ccc}1&\frac{5}{4}&-\frac{3}{2}\\0&-\frac{7}{4}&-\frac{7}{2}\end{array}\right] \quad\text{simplify}\\\\\left[\begin{array}{ccc}1&\frac{5}{4}&-\frac{3}{2}\\0&1&2\end{array}\right] \quad\text{multiply row 2 by -4/7}[/tex]

We can eliminate the y-term in the first row by subtracting 5/4 times the second row. This will put the matrix in the form that shows us the solution directly.

[tex]\left[\begin{array}{ccc}1-\frac{5}{4}(0)&\frac{5}{4}-\frac{5}{4}(1)&-\frac{3}{2}-\frac{5}{4}(2)\\0&1&2\end{array}\right] \quad\text{row 1 minus 5/4 times row 2}\\\\\left[\begin{array}{ccc}1&0&-4\\0&1&2\end{array}\right][/tex]

This tells us ...

  x = -4

  y = 2

So the solution is (x, y) = (-4, 2).

Answer 2
Final answer:

An augmented matrix organizes the coefficients of a system of linear equations. After setting up the matrix with the coefficients from the equations, methods like Gaussian elimination or Gauss-Jordan elimination can be used to solve the matrix and consequently, solve the system.

Explanation:

An augmented matrix is a compact way of keeping track of the coefficients in a system of linear equations. Here's how to form it and solve the system:

Identify the coefficients of the variables in the system of linear equations. Form a matrix based on these coefficients. For example, for the system of equations 2x + 3y = 7 and x - 4y = 11, the augmented matrix would be (2,3,7) on the first row and (1,-4,11) on the second row. Once the augmented matrix is formed, you can then use Gaussian elimination or Gauss-Jordan elimination methods to solve it.

Gaussian elimination involves using elementary row operations to manipulate the matrix to a form where the solution is easier to find, often called reduced row echelon form. For the Gauss-Jordan method, the main idea is to get zeros below (and above when possible) a leading 1, and make sure that leading 1 is the only nonzero entry in its column.

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Related Questions

A chef used 1/9 of a bag of potatoes for a meal. If the potatoes fed 5 people. What fraction of the bag did each person get

Answers

1/9 has to be divided by 5 if it is shared by others.

1/9 divided by 5 is 1/45 and each person would have 1/45

Answer is 1/45

All of the angles are exterior angles EXCEPT:

Answers

Answer:

Step-by-step explanation:

XYZ

The first one

I hope I helped you.

The volume of a rectangular prism has a volume of 42 cubic units the length is 3 units the width is 2 units what is the height

Answers

Answer: the answer is 7

Step-by-step explanation: 42/3=14 14/2=7 hope this helps

The value of the height will be 7 units.

What is mean by Rectangle?

A rectangle is a two dimension figure with 4 sides, 4 corners and 4 right angles. The opposite sides of the rectangle are equal and parallel to each other.

Given that;

The volume of a rectangular prism = 42 cubic units

And, The length is 3 units ,the width is 2 units.

Now,

Since, We know that;

Volume of rectangle = Length x Width x Height

Let height of a rectangular prism = x

Hence, we get;

⇒ Volume of rectangle = Length x Width x Height

⇒ Volume of rectangle = 3 × 2 × x

⇒ 42 = 6x

⇒ x = 42 / 6

⇒ x = 7 units

Thus, The value of the height will be 7 units.

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Which statement is true? A. A triangle can be congruent to a square. B. A rectangle can be congruent to a square. C. All circles are congruent. D. None of the above is true.

Answers

♫ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ♫

Congruent means it is the same shape and size. Therefore, A is incorrect as a triangle and a square aren't the same shape. The same applies to B. C is also incorrect as not all circles are the same size.

In short, the correct answer is option D. None of the above is true.

Hope This Helps You!

Good Luck (:

Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ

Answer:

The answer is B

Step-by-step explanation:

Congruent means In geometry, two figures or objects are congruent if they have the same shape and size, or if one has the same shape and size as the mirror image of the other.

Meaning a square and an rectangle are congruent because they both have four sides

Plus: I just took the test and got it right

The time required for an automotive center to complete an oil change service on an automobile approximately follows a normal​ distribution, with a mean of 17 minutes and a standard deviation of 2.5 minutes. ​(a) The automotive center guarantees customers that the service will take no longer than 20 minutes. If it does take​ longer, the customer will receive the service for​ half-price. What percent of customers receive the service for​ half-price? ​(b) If the automotive center does not want to give the discount to more than 5​% of its​ customers, how long should it make the guaranteed time​ limit?

Answers

Answer:

a) 11.51%; b) 13 minutes

Step-by-step explanation:

We will use a z score to answer these questions.  The formula for a z score is

[tex]z=\frac{X-\mu}{\sigma}[/tex]

For part a, X is 20, the mean is 17 and the standard deviation is 2.5:

z = (20-17)/2.5 = 3/2.5 = 1.2

Using a z table, we see the area to the left of, or less than, this value is 0.8849; this means the area to the right of, or greater than, is 1-0.8849 = 0.1151.  This means 11.51% of people have a time greater than 20 minutes and get half off.

For part b, we start out in the z table finding values as close to 5%, or 0.05, as possible.  There are two possibilities, 0.0505 (z=-1.64) and 0.0495 (z=-1.65). Since they are equally distant from the desired value, we will use -1.645 for z.  Our values for the mean and standard deviation are the same:

-1.645 = (X-17)/2.5

Multiply both sides by 2.5:

2.5(-1.645) = ((X-17)/2.5)(2.5)

-4.1125 = X-17

Add 17 to each side:

-4.1125+17 = X-17+17

12.8875 = X

This means the garage should make the guaranteed time no more than 13 minutes.

Tell whether this set of numbers is a Pythagorean Triple. (6, 9, 12) Yes or no?

Answers

No it’s not a Pythagorean triple

No. This does not meet the Pythagorean theory. A good and easy triple is (3,4,5) if the numbers reduce down to those numbers it’s correct. Or you can just do the simple equation a2+b2=c2. Or if you have the answer to either one of the A or B and you also have the answer to C you can easily find the answer by squaring the numbers and subtracting then you get the squared answer to the missing side. Say your adjacent side of your right triangle is 3 and your hypotenuse is 5. Square them both. So that would be 9 and 25. Subtract. 25-9= 16. Bam you found the missing side. 4. That’s also another simple way to find the sides of a right triangle that teachers usually don’t like to teach.

The school fun fair made $ 1,768 on games and $978 on food sales. How much money did the fun fair make on games and food sales

Answers

The school made $2742 on games and food sales !!

Use the limit theorem and the properties of limits to find the limit.

Answers

Answer:

The answer is √3/4 ⇒ answer (d)

Step-by-step explanation:

∵ [tex]\lim_{n \to \infty} \frac{\sqrt{3x^{2}+2} }{4x+1}[/tex]

* By using the limit theorem: divide up and down by x

∵ x = √x²

∴ [tex]\sqrt{\frac{3x^{2} }{x^{2}}+\frac{2}{x^{2}}[/tex] =

  [tex]\sqrt{3+\frac{2}{x^{2}}[/tex] ⇒ numerator

∵ [tex]\frac{4x}{x}+\frac{1}{x}=4+\frac{1}{x}[/tex] ⇒ denominator

∵ x →∞ ⇒ ∴ 2/x² = 2/∞ = 0 and 1/x = 1/∞ = 0

∴ [tex]\lim_{x \to \infty}\frac{\sqrt{3+\frac{2}{x^{2}}}}{4+\frac{1}{x}}=\frac{\sqrt{3}}{4}[/tex]

∴ The answer is √3/4 ⇒ (d)

Hello!

The answer is: [tex]d.\frac{\sqrt{3} }{4}[/tex]

Why?

Since the degree of both numerator and denominator are the same, the result will be a number different of zero, so the first given option (a) it's incorrect.

We need to "break" the indeterminate form of the limit in order to find the correct answer.

To solve this limit, we must divide each term by the largest degree term, for this case is "x" since the numerator is inside of a square root.

So, doing it we can solve the limit:

[tex]\lim_{x \to \infty}\frac{\sqrt{\frac{3x^{2} }{x^{2} }+\frac{2}{x^{2}}}}{\frac{4x}{x}+\frac{1}{x}}\\\\ \lim_{x \to \infty} \frac{\sqrt{3+\frac{2}{x^{2}}}}{4+\frac{1}{x}}[/tex]

Then, before evaluating the limit, we must remember that any number divided by infinity will give as result zero (0), so:

[tex]\lim_{x \to \infty} \frac{\sqrt{3+\frac{2}{(infinity)^{2}}}}{4+\frac{1}{infinity}}\\\\\lim_{x \to \infty} \frac{\sqrt{3+0}}{4+0}=\frac{\sqrt{3} }{4}[/tex]

So, the correct option is: [tex]d.\frac{\sqrt{3} }{4}[/tex]

Have a nice day!

Find the following measure for this figure.

Lateral area =
55 square units
5√(47) square units
5√(146) square units

Answers

Answer: last option (5π√146 units²)

Step-by-step explanation:

To solve the exercise you must apply the formula for calculate the lateral area of a cone, which is shown below:

 [tex]LA=r*L*\pi[/tex]

where r is the radius but L is the slant height.

As you can see in the figure attached:

[tex]r=5[/tex]

But you need to find the slant height with the Pythagorean Theorem (L would be the hypotenuse):

[tex]L=\sqrt{11^2+5^2}=\sqrt{146}[/tex]

Substitute into the formula, then:

 [tex]LA=(5)(\sqrt{146})\pi=5\pi\ \sqrt{146[/tex]units²

Answer:

The correct answer is 5√146π  square units

Step-by-step explanation:

From the figure we can see a cone

Points to remember

Lateral surface area of cone = πrl

r - Radius of cone

l - Slant height of cone

To find the slant height

From figure we get,

r = 5 units and height = 11 units

Slant height² = radius² + height² =  5² + 11² = 25 + 121 = 146

Slant height = √146 units

To find the lateral area

lateral area = πrl =  π * 5 * √146  = 5√146π  square units

The correct answer is 5√146π  square units

Suppose x has a distribution with μ = 40 and σ = 12. (a) If random samples of size n = 16 are selected, can we say anything about the x distribution of sample means? Yes, the x distribution is normal with mean μ x = 40 and σ x = 0.8. Yes, the x distribution is normal with mean μ x = 40 and σ x = 12. Yes, the x distribution is normal with mean μ x = 40 and σ x = 3. No, the sample size is too small. Changed: Your submitted answer was incorrect. Your current answer has not been submitted. (b) If the original x distribution is normal, can we say anything about the x distribution of random samples of size 16? No, the sample size is too small. Yes, the x distribution is normal with mean μ x = 40 and σ x = 3. Yes, the x distribution is normal with mean μ x = 40 and σ x = 12. Yes, the x distribution is normal with mean μ x = 40 and σ x = 0.8.

Answers

Answer:

a: no the sample size is too small

b:  Yes, the distribution is normal with a mean of 40 and standard deviation of 12

Step-by-step explanation:

a:  If n < 30, we need to know that the sample is normally distributed or else we can't determine anything.  When sample sized get very large, they usually resemble normally distributed data sets so we can still make conjectures even if the data isn't officially normally distributed

b: The question tells us that the sample is normally distributed, so even though n < 30, we can still make conjectures about the population

In london, 1 litre of petrol costs 108.9p In Ney York, 1 US gallon of petrol costs $2.83 1 US gallon = 3.785 litres ?1= $1.46 In which city is petrol better value for money, London or New York? You must show your working.

Answers

Answer:

In London it cost $ 6.017 while in Newyork it cost $2.831

so NewYork is cheaper

Step-by-step explanation:

As we know, 1 US gallon = 3.785 liters

so,converting liters into gallon = 1.089 * 3.785

                                                   = 4.121 per gallon

Cost of 4.121 gallon petrol in dollars = 4.121 * 1.46

                                                            = $ 6.017

In London it cost $ 6.017 while in Newyork it cost $2.831

so NewYork is cheaper

Final answer:

Petrol is better value for money in New York, where it costs approximately £0.512 per litre after converting from USD to GBP and gallons to litres, compared to £1.089 per litre in London.

Explanation:

To determine where petrol is better value for money, we need to compare the cost per litre in both London and New York, taking into account the exchange rate and units of measure. First, let's convert the cost of petrol in New York from gallons to litres:

The cost of 1 US gallon of petrol in New York is $2.83.1 US gallon is equivalent to 3.785 litres. So to find the cost per litre we divide $2.83 by 3.785 litres: $2.83 / 3.785 litres = $0.748 per litre.Next, we'll convert the cost from dollars to pounds using the given exchange rate of £1 = $1.46. So $0.748 multiplied by the exchange rate: $0.748 / $1.46 = £0.512 per litre.

Now, let's compare it to the cost in London:

The cost of petrol in London is 108.9p per litre, which is equivalent to £1.089 per litre.

Comparing the two:

London: £1.089 per litreNew York: £0.512 per litre

Therefore, the petrol is better value for money in New York as £0.512 per litre is less than £1.089 per litre.

Determine if the function f is an exponential function. If so, identify the base. If not, why not? F(x)= x^ -3

Answers

Answer:

  Not an exponential function. The exponent is a constant.

Step-by-step explanation:

An exponential function has the variable in the exponent. This function raises the variable to a fixed power, so it is not an exponential function.

In the figure, is tangent to the circle at point U. Use the figure to answer the question.

Describe the relationship among the lengths of the segments formed by the secant RT, and the tangent Suppose RT=16 in. and ST=4 in. Find the length of . Show your work.

Answers

Answer:

The length of TU is [tex]8\ in[/tex]

Step-by-step explanation:

we know that

The Intersecting Secant-Tangent Theorem states that, if a tangent segment and a secant segment are drawn to a circle from an exterior point, then the square of the measure of the tangent segment is equal to the product of the measures of the secant segment and its external secant segment

so

in this problem

[tex]TU^{2}=RT*ST[/tex]

we have

[tex]RT=16\ in[/tex]

[tex]ST=4\ in[/tex]

[tex]TU^{2}=(16)(4)[/tex]

[tex]TU^{2}=64[/tex]

[tex]TU=8\ in[/tex]

What is the sum of the first 19 terms of the arithmetic series?

3+8+13+18+…



Enter your answer in the box.
_______

Answers

Answer:

i think its 912

Step-by-step explanation:

i am not sure though

The sum of the first 19 terms of the given arithmetic series is equal to 912.

Given the following sequence:

3 + 8 + 13 + 18 + …

What is an arithmetic series?

A arithmetic series can be defined as a series of real and natural numbers in which each term differs from the preceding term by a constant numerical quantity.

Mathematically, an arithmetic series is given by the expression:

[tex]S_n = \frac{n}{2}(2a +(n-1)d)[/tex]

Where:

d is the common difference.a is the first term of an arithmetic series.n is the total number of terms.

Substituting the given parameters into the formula, we have;

[tex]S_{19} = \frac{19}{2}(2(3) +(19-1)5)\\\\S_{19} = 9.5(6+18(5))\\\\S_{19} = 9.5(6+90)\\\\S_{19} = 9.5 \times 96[/tex]

19 term = 912.

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Question for Math.
What is 3x-1?

Answers

the answer is -3 because i searched it and that’s what came up

The answer is -3 hope this helps

Please help me out :)

Answers

180-124=56

56/2=28

Ans 28

B is the midpoint of AC if AB equals X +5 and BC equals 2X -11 find the measure of AB

Answers

Answer:

  AB = 21

Step-by-step explanation:

The midpoint divides the segment into two congruent parts, so you have ...

  AB = BC

  x +5 = 2x -11 . . . substitute the given expressions for AB and BC

  16 = x . . . . . . . . add 11-x

Then the measure of AB is ...

  AB = x +5 = 16 +5 = 21

Which system of linear inequalities is graphed?

Answers

Answer:

Should be the first one again

The dotted line is a vertical line at x -2, so we know the first equation is X<-2

The solid line means the equation has to be less  than or equal to and since it crosses the dotted line at -2

the second equation would be y <=-x-2

The first choice is correct.

Given that the measure of ?x is 30°, and the measure of ?y is 35 °, find the measure of ?z.

Answers

Final answer:

To find the measure of angle z, subtract the measures of angles x and y from 180°. Therefore, angle z = 180° - 30° - 35° = 115°.

Explanation:

The subject of the question is geometry, specifically dealing with the measures of angles. Without more context, it's difficult to provide an exact answer. However, if angles x, y, and z form a triangle, then the measure of angle z can be found using the property that the sum of all angles in a triangle is 180°.

To find the measure of angle z, you need to recall that the sum of the angles in a triangle is always 180°. So, you can start by finding the measure of angle z by subtracting the measures of angles x and y from 180°.

Therefore, angle z = 180° - 30° - 35° = 115°.

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Adam says that the expression 52 - 3y is equal to 20 when y = 2 explain why Adams awnswe is incorrect

Answers

Answer:

y=10.33333333333

Step-by-step explanation:

52-3y=20

52-20=3y

3y=32

y=10.3333

Team A has nine more points than team B. Team A has four times as many points as team B. Dose anyone know the answe?

Answers

Team A is the correct answer

Answer:

Team A has 12 points , Team B has 3

Step-by-step explanation:

You choose at random from letters a,b,c, and d, and you roll a number cube once. What are your chances you get a and 5

Answers

Answer:

your answer is 10! please mark brainliest :))))))

Step-by-step explanation:

The angle of elevation from a soccer ball on the ground to the top of the goal is 38 degrees. If the goal is 8 feet tall, what is the distance from the ball to the goal?

Answers

Answer:

The distance is 10.24 feet ( to the nearest hundredth).

Step-by-step explanation:

Use trigonometry of a right angled triangle:

The angle = 38 degrees, opposite side = 8 ft, we require the adjacent side:  We have  opposite / adjacent side so we need the tangent.

tan 38 = 8 / a

a = 8 / tan 38

= 10.24 feet.

Use the laws of logarithms and the values given below to evaluate the logarithmic expression (picture provided)

Answers

Answer: Option a.

Step-by-step explanation:

To solve the given exercise, you must keep on mind the law of logarithms shown below:

 [tex]log(a)-log(b)=log(\frac{a}{b})[/tex]

Therefore, by applying the law , you can rewrite the expression given, as following:

[tex]log(\frac{5}{7})=log(5)-log(7)[/tex]

You know that:

[tex]log5=0.6990\\log7=0.8451[/tex]

Then, when you substitute values, you obtain:

[tex]0.6990-0.8451=-0.1461[/tex]

Use the quotient rule [ [tex]\text{log}_a\frac{x}{y} = \text{log}_ax-\text{log}_ay[/tex] ] to simplify.

[tex]\text{log}\frac{5}{7} = \text{log}(5)-\text{log}(7)[/tex]

Simplify using the given values.

0.6990 - 0.8451

-0.1461

Therefore, [tex]\text{log}\frac{5}{7}=-0.1461[/tex]

Best of Luck!

Two small pizzas with diameter 10 cost $15, while a large pizza with diameter of 16 cost $17 which pizza is less expensive per square inch

Answers

Answer:

The larger pizza is less expensive per square inch

Step-by-step explanation:

we know that

The area of a circle (pizza) is equal to

[tex]A=\pi r^{2}[/tex]

step 1

Find the area of the smaller pizza

we have

[tex]r=10/2=5\ in[/tex] ----> the radius is half the diameter

substitute

[tex]A=(3.14)(5)^{2}=78.5\ in^{2}[/tex]

Find the price per square unit

Remember that

The price of one smaller pizza is [tex]\$15/2=\$7.5[/tex]

so

[tex]\frac{7.5}{78.5}\frac{\$}{in^{2}}=0.10\frac{\$}{in^{2}}[/tex]

step 2

Find the area of the larger pizza

we have

[tex]r=16/2=8\ in[/tex] ----> the radius is half the diameter

substitute

[tex]A=(3.14)(8)^{2}=200.96\ in^{2}[/tex]

Find the price per square unit

so

[tex]\frac{17}{200.96}\frac{\$}{in^{2}}=0.08\frac{\$}{in^{2}}[/tex]

Therefore

The larger pizza is less expensive per square inch

Use the graph of the function f to determine the given limit

Answers

Answer:   b. 3

Step-by-step explanation:

The limit of the function as it approaches -3 from the left is 3.

The limit of the function as it approaches -3 from the right is 3.

Since the limit from the left equals limit from the right, then the limit of the function exists and is 3.

Answer: 3, or b

Step-by-step explanation:

The rule that it comes from both the right and the left and meets at a common point verifies this.

The length of a rectangle is three times it's width. If the perimeter of the rectangle is 64, find its length and width

Answers

set up an equation for the perimeter

l = length w = width

2l + 2w = 64

set up another equation as you know the length is 3 times the width

w = 3l

subsitute w = 3l into the 2l + 2w = 64

2l + 2(3l) = 64

solve for l

2l + 6l = 64

8l = 64

length = 8

subsitute into w = 3l

w = 3(8)

width = 24

What is the equation of a circle whose center is begin ordered pair negative 4 comma 6 end ordered pair and whose radius is 9 cm? Question 1 options: open parentheses x minus 4 close parentheses squared plus open parentheses y minus 6 close parentheses squared equals 81 open parentheses x plus 4 close parentheses squared plus open parentheses y minus 6 close parentheses squared equals 3 open parentheses x plus 4 close parentheses squared plus open parentheses y minus 6 close parentheses squared equals 81 open parentheses x minus 4 close parentheses squared plus open parentheses y plus 6 close parentheses squared equals 3

Answers

Answer:

[tex](x+4)^2+(y-6)^2=81[/tex]

Step-by-step explanation:

We want to find equation of a circle with center (-4,6) and radius 9cm.

The equation of a circle with center (h,k) and radius [tex]r[/tex] units is given by;

[tex](x-h)^2+(y-k)^2=r^2[/tex]

We substitute the radius and the center to obtain;

[tex](x+4)^2+(y-6)^2=9^2[/tex]

The required equation is:

[tex](x+4)^2+(y-6)^2=81[/tex]

Two cylinders, a and b are created cylinder a has volume v culinder b has the same height as a cylinder be has half the width of cylinder a write an expression that represents the volume of cylinder b in terms of v

Answers

Answer:

v/4

Step-by-step explanation:

Volume of cylinder a = v

Let the height of cylinder a is h and its radius is r. The volume of cylinder a will be:

[tex]v=\pi r^{2}h[/tex]

Height of cylinder b is same as cylinder a. So height of cylinder b is h.

Radius of cylinder b is half of radius(width) of cylinder a. So radius of cylinder b will be r/2

The volume of cylinder b will be:

[tex]v^{'}=\pi (\frac{r}{2} )^{2}h\\\\ v^{'}=\pi(\frac{r^{2}}{4})h \\\\ v^{'}=\frac{\pi r^{2}h}{4} \\\\ v^{'} = \frac{v}{4}[/tex]

Thus the volume of cylinder b will be v/4

Answer:

The volume of cylinder A is four times the volume of cylinder B.

Step-by-step explanation:

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Dylan work for 4 hours and is paid 17.50 per hour he must pay 15% in income taxes what amount does he earn after taxes

Answers

Final answer:

Dylan earns $17.50 per hour for 4 hours, yielding a total income of $70. After deducting 15% of his total earnings ($10.50) for income taxes, Dylan's earnings reduce to $59.50.

Explanation:

To answer this question, we first need to calculate Dylan's total earnings before taxes. He earned $17.50 per hour for 4 hours, so his total earnings would be 4 hours * $17.50/hour = $70.

Next, we determine the amount of income tax. Dylan's income tax rate is 15%, so he would pay 15% of his total earnings in taxes: 15/100 * $70 = $10.50 in taxes.

Finally, we calculate Dylan's net earnings after tax by subtracting the tax amount from his total earnings: $70 - $10.50 = $59.50. Therefore, Dylan will earn $59.50 after taxes for 4 hours of work.

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Final answer:

Dylan earns $59.50 after taxes.

Explanation:

To calculate the amount Dylan earns after taxes, we need to first find out his total earnings before taxes.

Dylan works for 4 hours and is paid $17.50 per hour, so his total earnings before taxes are 4 hours multiplied by $17.50, which is $70.

Next, we need to calculate the amount of income tax Dylan needs to pay. He must pay 15% of his total earnings as income taxes, which is 15% of $70, which is $10.50.

To find out how much Dylan earns after taxes, we subtract the income tax amount from his total earnings,

so $70 - $10.50 = $59.50.

Therefore, Dylan earns $59.50 after taxes.

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