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andriy [413]
4 years ago
15

Find the center and the radius of the circle x^2-8x+2y=-y^2+19

Mathematics
1 answer:
Viefleur [7K]4 years ago
4 0

Answer:

Centre: (4,-1)

Radius: 6

Step-by-step explanation:

h = -8/-2 = 4

k = 2/-2 = -1

4² + (-1)² - (-19) = r²

r² = 36

r = 6

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Mark stated that the slope of the line that passes through these two points (1, -19) and (-2, -7) is -¼. Is Mark correct? Explai
ladessa [460]

9514 1404 393

Answer:

  no

Step-by-step explanation:

The slope formula is ...

  m = (y2 -y1)/(x2 -x1)

We can use the values ...

  (x1, y1) = (1, -19)

  (x2, y2) = (-2, -7)

Putting these into the formula gives ...

  m = (-7 -(-19))/(-2 -1) = 12/-3 = -4

The slope is -4, not -1/4. Mark is incorrect.

8 0
3 years ago
8. The graph of a linear function is shown on the grid. Which equation is best represented by this graph? (A.2C)
Korvikt [17]

Answer:

option A is correct if operation A is correct make me as brainleylist

7 0
3 years ago
Read 2 more answers
The diameter of a circle measures 7 5/6 inches. What is the radius of the circle? Enter your answer as a mixed number in the box
andrew-mc [135]

The radius of the circle expressed as a mixed number is:  3\frac{11}{12} inches.

<h3>What is the Radius of a Circle?</h3>

Radius of a circle = half the measure of the diameter of a circle.

Given:

diameter of a circle = 7\frac{5}{6} inches

Therefore:

Radius of the circle = 1/2(7\frac{5}{6})

= 1/2(47/6)

= (1 × 47)/(2 × 6)

= 47/12

= 3\frac{11}{12} inches.

Therefore, the radius of the circle expressed as a mixed number is:  3\frac{11}{12} inches.

Learn more about radius of a circle on:

brainly.com/question/24375372

4 0
2 years ago
Help me please, thanks ......
FrozenT [24]

Answer:

He rode 2 miles.

Teresa is right.

Step-by-step explanation:

1/4 = 0.25

0.25 x 8 = 2

3 0
3 years ago
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What is the percent of increase for a population that changed from 25,000 to 30,000?
Delvig [45]

Your answer would be 20% I believe


3 0
4 years ago
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