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MaRussiya [10]
3 years ago
6

Which equation describes the circle

Mathematics
1 answer:
deff fn [24]3 years ago
6 0

Answer:

B. (x-5)²+(y+1)² = 49

Step-by-step explanation:

An equation of a circle with center (h, k) and radius r is

\large \boxed{ {(x - h)}^{2}  +  {(y - k)}^{2}  =  {r}^{2} }

We have all given information we need. Our h is 5 - Our k is -1 and our radius is 7

Substitute these values in

\large{ {(x - 5)}^{2}  +  {(y - ( - 1))}^{2}  =  {7}^{2} } \\  \large{ {(x - 5)}^{2}  +  {(y  + 1)}^{2}  =  {7}^{2} } \\  \large{ {(x - 5)}^{2}  +  {(y  + 1)}^{2}  = 49 }

So the answer is B choice.

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Sloan [31]

Answer:

Sum of \frac{7x}{x^2-4} and \frac{2}{x+2} is \mathbf{\frac{9x-4}{x^2-4}}

Option B is correct answer.

Step-by-step explanation:

We need to find sum of \frac{7x}{x^2-4} and \frac{2}{x+2}

Finding sum of  \frac{7}{x^2-4} and \frac{2}{x+2}:

\frac{7x}{x^2-4}+\frac{2}{x+2}

We know that x^2-4 =(x+2)(x-2)

Replacing x^2-4

\frac{7x}{(x+2)(x-2)}+\frac{2}{x+2}

Now, taking LCM of (x+2)(x-2) and (x+2) we get (x+2)(x-2)

=\frac{7x+2(x-2)}{(x+2)(x-2)}\\=\frac{7x+2x-4}{(x+2)(x-2)}\\=\frac{9x-4}{(x+2)(x-2)}\\=\frac{9x-4}{x^2-4}

So, Sum of \frac{7x}{x^2-4} and \frac{2}{x+2} is \mathbf{\frac{9x-4}{x^2-4}}

Option B is correct answer.

6 0
2 years ago
What is the answer for 0.9 divided by 10 to the power of 3
velikii [3]

Answer:

0.0009

Step-by-step explanation:

0.9 / 10^3 = 0.0009

5 0
3 years ago
What transformation is represented by the rule (x, y)→(−x, −y) ?
postnew [5]
<span>rotation of 180° about the origin is correct. Changing the signs of both x and y rotates 180 degrees.
</span>
5 0
3 years ago
Read 2 more answers
Evaluate 7^2 PLEASE HELP ME
miss Akunina [59]
Evaluate 7^2 = 49
7•7=49
3 0
2 years ago
Please answer the question below. Please and thank you!
elena-s [515]

Answer:

1. -2/3   (-0.66666)

2. 45%  (-0.45)

3. 5.1%  (0.051)

4. 0.053 (0.053)

Step-by-step explanation:

Hope this helped!

8 0
3 years ago
Read 2 more answers
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