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Musya8 [376]
4 years ago
8

How to rewrite x2+y2-4x+12y-20

Mathematics
2 answers:
goblinko [34]4 years ago
7 0
You could add the common variables together, to get -2x+14y-20, I'm not sure of any other ways to answer this, I'm sorry. I hope this helps tho
Westkost [7]4 years ago
5 0
Assuming you are trying to find what kind of figure this represents, also that this = 0,

x^2 -4x       + y^2 +12y      =20
Completing the square for both x and y,
x^2 -4x +4 + y^2 +12y +36=20 + 4 + 36 = 60
(x-2)^2 + (y+6)^2 = 60
is a circle with center at (-2,6) with a radius of the square root of 60 or 2SQRT(15)
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X is greater than or equal to -8 and less than or equal to 2
elena-s [515]

2 ≥ x ≥ -8 is how this inequality would be displayed.

7 0
3 years ago
21. Mickey earned $475 from mowing lawns last summer. He deposited this money in an
Dennis_Churaev [7]

Answer:

first, u need to know the formula for compound interest, which is:

A = P(1 + \frac{r}{100})^{n}

where A is the final amount

P- initial amount

r- percent compounded(interest)

and

n- number of years

so

we have

A = 475(1 + \frac{3.8}{100})^{4}

3.8/100 = 0.038

1+0.038 =1.038

1.038^4 = 1.160885573136

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5 0
4 years ago
What is the value of the rational expression below when xis equal to 4?
horrorfan [7]
The answer is the letter c. 3
4 0
3 years ago
How do I use the arc length to find the circumference ?
Mashutka [201]
<span>arc length   =   circumference • [central angle (degrees) ÷ 360]

Solving this equation for circumference:
</span>
<span>circumference = arc length / (central angle / 360)

</span><span>circumference = 12 / (85/360)

</span>circumference = 12 / <span><span>0.2361111111 </span>
</span>
<span>circumference = </span> <span> <span> <span> 50.8235294118 </span> </span> </span>

Source:
http://www.1728.org/radians.htm


8 0
3 years ago
The cost of toilet paper is 9.99 for 9 rolls, what is the price per roll of toilet paper?​
vampirchik [111]

Answer:

$1.11

Step-by-step explanation:

Find the price per roll by dividing the cost by the number of rolls:

9.99/9

= 1.11

So, the price per roll of toilet paper is $1.11

5 0
3 years ago
Read 2 more answers
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