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tamaranim1 [39]
3 years ago
7

Find the center and the radius of the circle with the equation: x^2 +2x + y^2-2y-14 =0

Mathematics
2 answers:
maw [93]3 years ago
6 0
X²+2x+y²-2y=14
adding 1+1 both sides

x²+2x+1+y²-2y+1=14+1+1

(x+1)² +(y-1)² = 4²

x=-1 y= 1 r = 4

hope it helps !!

FrozenT [24]3 years ago
5 0
We need to convert the equation of the circle to standard form only then we can find the radius and the center of the circle.

x^{2} +2x+ y^{2}-2y-14=0 \\  \\ 
x^{2} +2x+ y^{2}-2y=14 \\  \\ 
x^{2} +2(x)(1)+ y^{2}-2(y)(1)=14 \\  \\ 
 x^{2} +2x+1 + (y^{2}-2y+1)=14+1+1  \\  \\ 
(x+1)^{2}+(y-1)^{2} =16 


From this equation we can write:

Center of the circle is (-1,1) and the radius of the circle is 4.
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Sandals are on sale for 30% off. The original price of one pair of sandals is $15. What is the total cost, in dollars, of two pa
alexandr402 [8]

Answer:

$4.82

Step-by-step explanation:

30% of 15 = 4.5

7% of 4.5 = 0.315

4.5+0.315 = $4.815 approx $4.82

Please mark me brainliest

6 0
2 years ago
1. A farmer estimates her hens will produce
a_sh-v [17]

Answer:

Expected profit per dozen eggs = 4 ¢

Expected profit on the total egg production = 60,000 ¢

Step-by-step explanation:

Complete table as obtained online

Net Profit | 8 | 6 | 4 | 2 | 0 | -2

Probability |0.1|0.4|0.2|0.1|0.1|0.1

a) Expected profit per dozen eggs

Expected value is given as

E(X) = Σ xᵢpᵢ

xᵢ = each variable

pᵢ = probability of each variable

E(X) = (8×0.1) + (6×0.4) + (4×0.2) + (2×0.1) + (0×0.1) + (-2×0.1) = 4 ¢ per dozen

b) Expected profit on the total egg production

Last year, she had 12,000 dozen eggs

This year, she estimates 3,000 dozen more eggs

Estimated Total egg production this year = 12000 + 3000 = 15,000 dozen eggs

Expected profit per dozen eggs = 4 ¢

Expected profit on 15,000 dozen eggs = 15000 × 4 = 60,000 ¢

Hope this Helps!!!!

5 0
3 years ago
These two trapezoids are similar What is the correct way to complete the similarity statement?
pentagon [3]

Option A:

\mathrm{ABCD} \sim \mathrm{GFHE}

Solution:

ABCD and EGFH are two trapezoids.

To determine the correct way to tell the two trapezoids are similar.

Option A: \mathrm{ABCD} \sim \mathrm{GFHE}

AB = GF (side)

BC = FH (side)

CD = HE (side)

DA = EG (side)

So, \mathrm{ABCD} \sim \mathrm{GFHE} is the correct way to complete the statement.

Option B: \mathrm{ABCD} \sim \mathrm{EGFH}

In the given image length of AB ≠ EG.

So, \mathrm{ABCD} \sim \mathrm{EGFH} is the not the correct way to complete the statement.

Option C: \mathrm{ABCD} \sim \mathrm{FHEG}

In the given image length of AB ≠ FH.

So, \mathrm{ABCD} \sim \mathrm{FHEG} is the not the correct way to complete the statement.

Option D: \mathrm{ABCD} \sim \mathrm{HEGF}

In the given image length of AB ≠ HE.

So, \mathrm{ABCD} \sim \mathrm{HEGF} is the not the correct way to complete the statement.

Hence, \mathrm{ABCD} \sim \mathrm{GFHE} is the correct way to complete the statement.

3 0
3 years ago
Find the value of x.
nikklg [1K]

Answer:

x = 13

Step-by-step explanation:

Sum or interior angles of a triangle is 180,

6x + 19 + 5x - 15 + 3x - 6 = 180

6x + 5x + 3x + 19 - 15 - 6 = 180

14x + 19 - 21 = 180

14x - 2 = 180

14x = 180 + 2

14x = 182

x = 182 / 14

x = 13

5 0
2 years ago
-233.2 - 25.8<br> Please help.
Anon25 [30]

Answer:

-259

Step-by-step explanation:

brainliest

3 0
2 years ago
Read 2 more answers
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