By using the equation below complete the square, write the equation of the circle in standard form from the following equation. Then determine the center and radius of
a circle.

10y + x2 = -18+ 5x - y2

By Using The Equation Below Complete The Square, Write The Equation Of The Circle In Standard Form From

Answers

Answer 1

Given:

The equation of a circle is

[tex]10y+x^2=-18+5x-y^2[/tex]

To find:

The center and radius of the given equation by completing the square.

Solution:

The standard form of a circle is

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

where, (h,k) is center and r is radius of the circle.

We have,

[tex]10y+x^2=-18+5x-y^2[/tex]

It can be written as

[tex](x^2-5x)+(y^2+10y)=-18[/tex]

[tex]\left(x^2-5x+\left(\dfrac{5}{2}\right)^2\right)+\left(y^2+10y+\left(\dfrac{10}{2}\right)^2\right)=-18+\left(\dfrac{5}{2}\right)^2+\left(\dfrac{10}{2}\right)^2[/tex]

[tex]\left(x-\dfrac{5}{2}\right)^2+\left(y^2+10y+5^2\right)=-18+\dfrac{25}{4}+5^2[/tex]

[tex]\left(x-\dfrac{5}{2}\right)^2+(y+5)^2=-18+\dfrac{25}{4}+25[/tex]

[tex]\left(x-\dfrac{5}{2}\right)^2+(y+5)^2=\dfrac{-72+25+100}{4}[/tex]

[tex]\left(x-\dfrac{5}{2}\right)^2+(y+5)^2=\dfrac{53}{4}[/tex]

[tex]\left(x-\dfrac{5}{2}\right)^2+(y+5)^2=\left(\dfrac{\sqrt{53}}{2}\right)^2[/tex]          ...(ii)

On comparing (i) and (ii), we get

[tex]h=\dfrac{5}{2},k=-5,r=\dfrac{\sqrt{53}}{2}[/tex]

Therefore, the center is [tex]\left(\dfrac{5}{2},-5\right)[/tex] and the radius is [tex]\dfrac{\sqrt{53}}{2}[/tex] units.


Related Questions

The ratio of a to b is 6 to 1. and the ratio of b to c is 12 to 1. What is the value of 2a + 3b / 4b + 3c

A. 3/8
B. 5/17
C. 16/17.
D. 60/17
E. 48/7

Answers

Answer:

answer will be 5/17 as I have just substitute the number

The ratio of [tex]a[/tex] to [tex]b[/tex] is [tex]6[/tex] to[tex]1[/tex] and the ratio of [tex]b[/tex] to [tex]c[/tex] is [tex]12[/tex] to [tex]1[/tex], then the value of [tex]\frac{2a + 3b}{4b + 3c}[/tex]  is  [tex]\frac{180}{51}.[/tex]

What is ratio?

Ratio is used to compare to things i.e. numbers, size etc.

We have,

[tex]\frac{a}{b} = \frac{6}{1}[/tex]  and  [tex]\frac{b}{c} = \frac{12}{1}[/tex]

From the above given data we have to make value [tex]b[/tex] same in both ratios;

Therefore multiply [tex](\frac{a}{b})[/tex] ratios from [tex]12[/tex],

We get,

[tex]\frac{a}{b} = \frac{72}{12}[/tex]   and   [tex]\frac{b}{c} = \frac{12}{1}[/tex]

So,

[tex]a=72,\\b=12,\\c=1[/tex]

Now, putting above values in [tex]\frac{2a + 3b}{4b + 3c}[/tex],

[tex]=\frac{2(72) + 3(12)}{4(12)+ 3(1)}[/tex]

[tex]=\frac{180}{51}[/tex]

Hence we can say that The ratio of [tex]a[/tex] to [tex]b[/tex] is [tex]6[/tex] to [tex]1[/tex] and the ratio of [tex]b[/tex] to [tex]c[/tex] is [tex]12[/tex] to [tex]1[/tex], then the value of [tex]\frac{2a + 3b}{4b + 3c}[/tex]  is  [tex]\frac{180}{51}.[/tex]

To know more about ratios click here

https://brainly.com/question/13419413

#SPJ2

A.) 30yd2 B.) 6.5yd2 C.) 13yd2 D.)15yd2

Answers

Answer:

D. 15yd^2

Step-by-step explanation:

Area of triangle: A = bh/2

A = 10(3) / 2

A = 30 / 2

A = 15yd^2

Solve for b .

-9 b = 27
please will mark brainliest whoever gets it right

Answers

Answer:

b=-3

Step-by-step explanation:

hope this helps!

B=-3 jdjdjdjbebenejejehehd

Solve each system by elimination.
1) 6x - y=-14
-2x + y = 6

Answers

Answer:

(-2, 2)

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Equality Properties

Algebra I

Solving systems of equations using substitution/elimination

Step-by-step explanation:

Step 1: Define Systems

6x - y = -14

-2x + y = 6

Step 2: Solve for x

Elimination

Combine 2 equations:                    4x = -8Divide 4 on both sides:                   x = -2

Step 3: Solve for y

Define equation:                    -2x + y = 6Substitute in x:                       -2(-2) + y = 6Multiply:                                  4 + y = 6Isolate y:                                 y = 2

Whoever answers gets brainly

Answers

Answer:

The function y = 5 [tex](.98)^{x}[/tex] represents exponential decay

The percentage rate of change is 2%

Step-by-step explanation:

The formula of the exponential growth is y = a [tex](1+r)^{x}[/tex], where

a is the initial valuer is the rate of increase in decimal ⇒ (1 + r) > 1

The formula of the exponential decay is y = a [tex](1-r)^{x}[/tex], where

a is the initial valuer is the rate of decrease in decimal ⇒ (1 - r) < 1

Let us solve the question.

∵ y = 5 [tex](.98)^{x}[/tex]

→ Compare it with the forms above

∴ a = 5

∵ The rate of change is .98

.98  < 1

→ That means the rate of change is decreasing

The function y = 5 [tex](.98)^{x}[/tex] represents exponential decay

→ From the 2nd form above

(1 - r ) = .98

→ Subtract 1 from both sides

∴ 1 - 1 - r = .98 - 1

∴ - r = - .02

→ Divide both sides by -1

r = .02

→ Multiply it by 100% to change it to a percentage

∵ .02 × 100% = 2%

r = 2%

The percentage rate of change is 2%

a map of Texas uses the scale of 1.5 to represent 60 miles the distance between corpus Christi to Houston is 60 miles what is the distance in inches between the cities on the map

Answers

Answer:ahhhh

Step-by-step explanation:

I hope this helps

Which of the following represents the y-intercept of the function y = log (x + 100) - 4 ? *
a. -1
b. -2
c. -3
d. -4

Answers

Answer:

b

Step-by-step explanation:

To find the y- intercept, let x = 0 in the equation and solve for y, that is

y = [tex]log_{10}[/tex](0 + 100) - 4

  = [tex]log_{10}[/tex] 100 - 4

  = 2 - 4

 = - 2 ← y- intercept → b

The y-intercept of the function y = log (x + 100) - 4 is -2

What is y-intercept?

The y-intercept is the point where the line intersects the y-axis.

Given a function, y = log (x + 100) - 4

Solving for the y- intercept,

Let x = 0 in the equation and solve for y, that is

y = log(0 + 100) - 4

=  log100 - 4

= 2 - 4

= -2

Hence, The y-intercept of the function y = log (x + 100) - 4 is -2

For more references on y-intercept, click;

https://brainly.com/question/14180189

#SPJ2

1 3/4 x 1 1/3 give your answer as a mixed number

Answers

Answer:

2 1/3

Step-by-step explanation:

1 3/4  is equivalent to 7/4

1 1/3 is equivalent to 4/3

7/ 4 x 4/3

reduce with greatest common factor so the two 4 are out (show a line crossing out the top and bottom 4 )

now you're left with 7 x 1/3 = 7/3

7/3 = 2 1/3

The product of two given mixed fractions is [tex]2\frac{1}{3}[/tex].

The given mixed fractions are [tex]1\frac{3}{4}[/tex] and [tex]1\frac{1}{3}[/tex].

What is the product of two fractions?

The product of two fractions is the product of the numerators and the product of the denominators.

Product of two fractions = Product of their denominators / Product of their numerators.

Here, the mixed fraction [tex]1\frac{3}{4}[/tex] can be written as [tex]\frac{7}{4}[/tex] and the mixed fraction [tex]1\frac{1}{3}[/tex] can be written as [tex]\frac{4}{3}[/tex].

Now, 7/4 × 4/3

= 7/3

= [tex]2\frac{1}{3}[/tex]

Therefore, the product of two given mixed fractions is [tex]2\frac{1}{3}[/tex].

To learn more about the product of two fractions visit:

https://brainly.com/question/7335118.

#SPJ2

Need answer ASAP. Thanks!

Answers

Answer:

The missing angle is about 27.92°.

Step-by-step explanation:

This is a tangent equation, as there is no hypotenuse value. I'll use x as the missing angle.

tan(x) = opposite/adjacent

tan(x) = 20/38

tan(x) = 0.52631578947368421052631578947368

tan(x) ≈ 0.53

Now, we have to reverse.

tan⁻¹(0.53) = x

27.92358972 = x

x ≈ 27.92°

Urgent please help, will give brainliest

Answers

in right angle traingle two angle are equal

so.x=y

in triangle

x+y+90=180(sum of interior angle of triangle)

2x=180-90

x=90/3=45°

simplify (4x²y³)(2xy⁶)​

Answers

Answer:

8x^3y^9

Step-by-step explanation:

just multiply 4 by 2. then, add each exponent. for example, there is x² and there is x, so do x² × x = x³. then do y³ × y^6 = y^9.

8x^3 y^9

multiply the 4 and 2 then add the exponents of the common variables

If a 6ft baby giraffe casts a 4ft long shadow then how tall is an adult giraffe that casts a 10 ft shadow

Answers

The adult giraffe will be 8 ft tall
It will be 8 feet tall

What are the values of X and why

Answers

#1 as in first answer

2p=

PLZ HELPS IT SAYS

Evaluate the expression for p=5

2p=

Is it 25???

Answers

p=5 so you have to substitute 2p for 2(5)= which is 10 i believe so
it’s 10.

explanation:
2p= —> 2(p)=

p=5

replace p with 5.

2(5) = 10.

Anyone know the answer??

Answers

Answer:

J and I

Step-by-step explanation:

anything els?.... let me know

Ok i NEED HELP (skip number 2)

Answers

Do you still need help with this?

Answer:

[tex]\frac{8}{9} /12=\frac{2}{27}[/tex]

The GCF of 45 and 60 is 15

The GCF of 20 and 32 is 4  

The GCF of 16 and 24 is 8

The graph shown below suggests:
A. a negative correlation.
B. no correlation
C. a weak correlation.
D. a positive correlation.

Answers

Answer:

B. no correlation

Step-by-step explanation:

Out of 1800 flags, 36 are purple. What percent of the flags are not purple?

Answers

Answer:

2% are purple

Step-by-step explanation:

36/1800 = 0.02 = 2%

Answer:

I think...

its 98% of the flags that are NOT purple

Step-by-step explanation:

36 of 1800 is 2%


PLEASE Find the scale factor that was used
Will give brainliest!!
Check provided photo.

Answers

Answer:

1/4

Step-by-step explanation:

Scale factor = 3/12 = 1/4

3, 6, 9, 12
Which number is not like the others? Justify your choice.

Answers

Answer:

12

Step-by-step explanation:

12 is a two digit #

Answer:

first of all there are many ways to compare numbers. example

the digit they havethe pattern they havethere amount

I don't know how to compare them but I try my best

Step-by-step explanation:

the first 3 numbers have only one digit but the 4th has 2 digits.but it in my opinion you don't want this answer.

so this is not the reason

3 have 2 factor

6 have 4 factor

9 have 3 factor

12 have 5 factors

so as the number increase the factors should increase but 9 has less factors than 6 .so I think 9 is the different one

Five girls are sitting in a row. Ruhi is sitting on the extreme left & adjacent to Khushi. Tina and Khushi are not sitting together. Sinu and Pihu are sitting Togther but Sinu is

not sitting next to Tina. Who are sitting at extreme ends of the row


A. Khushi and Pihu

B. Ruhi and Tina

C. Ruhi and Sinu

D. Pihu and Tina​

Answers

C, Ruhi and Sinu because Ruhi is at the far left and Sinu isn’t next to anyone

The expression 200 - 16t2 models the height in feet of an object that falls from the initial height of 200 feet t seconds after being dropped. Find the height of the object after 0.75 seconds. Make sure and include the units of feet in your answer for full credit. Round your answer to the nearest hundredth place.

Answers

Answer:

Concept: Modeling expressions

We are given the equation [tex]200 - 16 {t}^{2} [/tex]We want to find the time after 0.75 seconds given that t is represented in seconds.Hence we do [tex]200 - 16(0.75)^{2} [/tex]Hence we get the answer to 191 feet

The height of the object that falls after 0.75 seconds given that t is represented in seconds is 191 feet.

What is a quadratic equation?

A quadratic equation is the second-order degree algebraic expression in a variable. the standard form of this expression is  ax² + bx + c = 0 where a. b are coefficients and x is the variable and c is a constant.

The expression 200 - 16t^2 models the height in feet of an object that falls from the initial height of 200 feet t seconds after being dropped.

We need to find the time after 0.75 seconds given that t is represented in seconds.

The expression is given

[tex]200 - 16t^2[/tex]

time t = 0.75

Substitute the value of t in the given expression

= 200 - 16(0.75)^2

= 200 - 9

= 191

Hence we get the answer to 191 feet.

Learn more about quadratic equations;

brainly.com/question/13197897

Carmen reads 2/3 chapters in 7/8 hours. What is the unit rate in chapters per hour?

Write your answer in simplest form.

Answers

Answer:

16/21

Step-by-step explanation:

Divide both sides by 7 to get 1/8

2/3 = 7/8

1/7 x 2/3 = 7/8 x 1/7

2/21 = 1/8

Then multiply both sides by 8 to get 8/8 which is 1

8/1 x 2/21 = 1/8 x 8/1

16/21 = 1

Please help me with this math question asap. I will mark brainliest Thank you so much! Question 4/5

Answers

Answer:

So... This is it

1. JK = LM, JKM = LMK -> This is given information.

- From this given information, we know:

1. 2 congruent sides

2. 2 congruent angles

Now all we have to do is find one more side to prove SAS triangle congruence.

Next, we notice that the side MK is used by both the triangles we are trying to prove congruent. So we can say "MK = MK" by the reflexive property. (Since they share the same side).

Then, we can say triangle JMK is = triangle LKM because of SAS congruence.

*Please note the = signs I used should be actually congruence signs*

Use the Law of Sines to find the value of ZA.
С
25
28
62°
B
А

Answers

28 kksnsiannejdbssjznnaja

$12.99 sweater, 7% tax

Answers

.90 (ninety cents)
basically what you is you multiply the value of the sweater by the percentage of the tax

Answer the question in the image below

Answers

Answer:

ans of an 1 is option b

Step-by-step explanation:

because x and y both are +ve

Which of these brands have the lowest cost per unit? PLEASE HELP MY FIRST MATH GRADE OF THE QUARTER IS ON THE LINE!

Answers

Answer:

you need a dotted point starting at 3 and going to to the right

Step-by-step explanation:

the dotted point means x < , x > and since it is greater you always go to the right

Plz help me I need tu turn this is by midnight!!

Answers

Answer:

The last answer.

Step-by-step explanation:

It looks to be the correct answer because for the one above you can't simplify 27 by 5.

it’s the last choice, b/5 = 7

I NEED ANSWER QUICK. Will give brainliest

Answers

Answer:

A

Step-by-step explanation:

Both of them Equal 4

Other Questions
QUICK I NEED HELP PLZZZWhich sentence correctly uses the word yon?The yon tree is quite distant.It's a yon tree because it belongs to you.Yon tree is so close, it is within my grasp.He's over there, next to yon tree. Can someone answer this please 3. Michael says he can move ABCDE onto A"B"C"D"E" with one transformation by translating ABCDE diagonally so that it moves 8 units up and 10 units right. Is he correct? Explain why or why not. Is the American dream achievable for immigrants? Solve x and y 3x-4y=18,9x-2y=12 What is the answer to this? What were the factors that caused immigration to spikeand what were the factors that caused immigration to be low? really need help on this so please help as soon as you can thanks Birthrate, death rate, and movement are the three causes of changes in the human population size. Which type of writing should NOT use informal language?Question 1 options:Song LyricsSocial MediaResearch PapersAdvertisements msgurl!!!Come and get em!!!! Plz don't answer unless you are msgurl!!! 1. Express (0.04252.5) as fractionA 17/10000 B 17/1.000 C. 17/250 0.17/100 E 17/10 IOWhich is a characteristic ofcompounds?A. Compounds are only puresubstances.B. Compounds are the smallestform of a particle.C. Compounds are made of atleast two types of matter. When Sam was a small child, he ________ spend hours every day playing with stones in the garden. * would * was * should * used x^3 + 2x^2 24x^ write the polynomial in factored form how can you manage your family resources wisely Marcus looked out in the audience and saw 40% of the chairs were filled. There were 42 people sitting in the chairs. Enter the total number of chairs in the audience. HELP ME PLEASEEE IS FOR TODAY)::: Please help me guysWhat is the overall effect of Jefferson's nuanced word choices in the declaration?to compare the colonists' aggressions with the King's total lack of restraintto embarrass King George with descriptions of his terrible behaviorto contrast the colonists' decency and patience with the King's tyrannyto suggest that all British citizens should reject the authority of their king How many pairs of homologous chromosomes are in this picture? Help plz Hello boys and girls plz help me with this question ASAP Thank you so much