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ra1l [238]
3 years ago
15

What are the coordinates for the center of the circle and the length of the radius ?

Mathematics
2 answers:
Vadim26 [7]3 years ago
5 0

the answer to your question is D

Norma-Jean [14]3 years ago
3 0

Answer:  the correct option is

(D) (-7, -1), 6 units.

Step-by-step explanation:  We are given to find the co-ordinates of the center and the length of the radius of the following circle :

x^2+y^2+14x+2y+14=0~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)

We know that

the STANDARD equation of a circle with center at the point (h, k) and radius of length r units is given by

(x-h)^2+(y-k)^2=r^2.

From equation (i), we have

x^2+y^2+14x+2y+14=0\\\\\Rightarrow (x^2+14x+49)+(y^2+2y+1)+14-49-1=0\\\\\Rightarrow (x+7)^2+(y+1)^2-36=0\\\\\Rightarrow (x+7)^2+(y+1)^2=36\\\\\Rightarrow (x-(-7))^2+(y-(-1))^2=6^2.

Comparing the above equation with the standard equation of a circle, we get

center, (h, k) = (-7, -1)  and radius, r = 6 units.

Thus, (D) is the correct option.

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I need help plz༼ つ ◕_◕ ༽つ
slavikrds [6]

Answer:

Statement 1:  UV ║ WZ

Statement 2: Points S,Q,R and T are all lie on the same plane.

Statement 3:  m<SQT=180 deg

Statement 4:  m<SQV + m<VQT = m<SQT

Statement 5:  m<SQV + m<VQT = 180 deg

Now, the next statement is as:

Statement 6:   which is statement III.  

(Same side interior angles theorem)  m<VQT + m<ZRS = 180 deg

Statement 7:  which is statement II.

(Substitution property of equality) m<SQV + m<VQT = m<VQT + m<ZRS

Statement 8:  m<SQV + m<VQT - m<VQT = m<VQT + m<ZRS - m<VQT

which is statement I.

(Subtraction property of equality)

So, the correct order of the given reasons to complete the proof is III, II, I.  

Step-by-step explanation:

4 0
3 years ago
How can you tell that triangles are congruent without knowing the lengths of all sides and the measures of all angles?
Bezzdna [24]

Answer:

  • SAS
  • ASA
  • AAS
  • HL
  • SSA (conditionally — see below)

Step-by-step explanation:

Of the 5 triangle congruence theorems, the only one that cannot be used is SSS, which requires you know all three sides.

If you don't know all three sides, you must know at least one angle, at least one side, and at least one additional angle or side (see below).

___

If the sides you know (in relation to the angle you know) are SSA, then <em>the first side (opposite the angle) must be known to be the longest</em>, or congruence is not assured. This is why SSA is not usually listed among the congruence theorems. (However, HL is a version of this, as the right angle will be opposite the longest side.)

3 0
3 years ago
Read 2 more answers
I need help....................
Anastasy [175]
1. 12 per game
2. 1 game costs 20$
4 0
4 years ago
Given that y = sin(x+y),find the derivative when (x,y)=(π,0)​
lisov135 [29]
<h2>Answer:</h2>

Shown in the explanation

<h2>Step-by-step explanation:</h2>

Recall that an implicit function is a relation given by the form:

{\displaystyle R(x_{1},\ldots, x_{n})=0}

Where R is a function of two or more variables. In this case, that function is:

y = sin(x+y)

and is implicit because we can define it as:

y-sin(x+y)=0 having two variables.

So, let's take the derivative:

\frac{d}{dx}\left(y\right)=\frac{d}{dx}\left(\sin \left(x+y\right)\right) \\ \\

Applying chain rule:

\frac{d}{dx}\left(\sin \left(x+y\right)\right)=\cos \left(x+y\right)\left(1+\frac{d}{dx}\left(y\right)\right)

But:

\frac{d}{dx}\left(y\right)=y'

Therefore:

y'=\cos \left(x+y\right)\left(1+y'\right)

Isolating y':

\frac{d}{dx}\left(y\right)=y'=\frac{\cos \left(x+y\right)}{1-\cos \left(x+y\right)}

When (x,y)=(\pi,0):

\frac{d}{dx}\left(y\right)|_{(\pi,0)}=\frac{\cos \left(\pi+0\right)}{1-\cos \left(\pi+0\right)} \\ \\ \frac{d}{dx}\left(y\right)|_{(\pi,0)}=\frac{\cos \left(\pi\right)}{1-\cos \left(\pi\right)} \\ \\ \frac{d}{dx}\left(y\right)|_{(\pi,0)}=\frac{-1}{1-(-1)} \\ \\ \boxed{\frac{d}{dx}\left(y\right)|_{(\pi,0)}=-\frac{1}{2}}

4 0
3 years ago
How many solutions does the equation 3x-10(x+2)=13-7x
Alex Ar [27]

Answer:

No solution

Step-by-step explanation:

1. Multiply the parenthesis by -10

2. Collect like terms

3. Cancel equal terms

4. You're left with -20=13, which is false. There is no solution.

4 0
3 years ago
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