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KonstantinChe [14]
2 years ago
13

What is the value of b for the following circle in general form? x2 + y2 + ax +by+c=0​

Mathematics
1 answer:
liberstina [14]2 years ago
7 0

Answer:

Step-by-step explanation:

<u><em>(1).</em></u> (x - <em>h</em>)² + (y - <em>k</em>)² = <em>r</em>²

where <em>(h, k)</em> are coordinates of a center of the circle with radius <em>r</em>

<u><em>(2).</em></u> ( a ± b )² = a² ± 2ab + b²

~~~~~~~~~~~~~~

( 1 , - 2 ) ; r = 3

( x - 1 )² + ( y + 2 )² = 3²

x² - 2x + 1 + y² + 4y + 4 = 9

x² + y² - 2x + 4y - 4 = 0

a = - 2

b = 4

c = - 4

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Helpppppppppppppppppppppp​
fredd [130]

Answer:

309 inches squared

Step-by-step explanation:

bottom face: 40

left face: 96

right face: 104

front face: 30

behind face: 30

add them up

8 0
3 years ago
I need help please!
Vlad1618 [11]

Answer:

\Huge \boxed{y=3x+6}

Step-by-step explanation:

y = mx + b

m = slope

b = y-intercept

The slope can be found from two points.

\displaystyle m=\frac{y_2-y_1}{x_2-x_1}

The two points from the graph are (1, 9) and (2, 12).

Plugging in the values and evaluating.

\displaystyle m=\frac{12-9}{2-1}

\displaystyle m=\frac{3}{1}

m=3

The slope of the line is 3.

The y-intercept of the line is where the line cross the y-axis.

The line crosses the y-axis at (0, 6).

b=6

The slope-intercept form of the line is:

y=3x+6

8 0
3 years ago
Amy has set aside $150 a month for her cell phone bill. The cost for a monthly cell phone plan is a $65 access fee plus $20 per
Lapatulllka [165]
65+20=85 150-85=65

She will have 65$ left over

The equation can be
65+20=85
Or
150-85
Or
65+20=85 150-85=65
It depends on the option. I hope this helped
3 0
3 years ago
(14.14) larry reads that 1 out of 6 eggs contains salmonella bacteria. so he never uses more than 5 eggs in cooking. if eggs do
melomori [17]

we know that

The probability that "at least one" is the probability of exactly one, exactly 2, exactly 3, 4 and 5 contain salmonella.

The easiest way to solve this is to recognise that "at least one" is ALL 100% of the possibilities EXCEPT that none have salmonella.

If the probability that any one egg has 1/6 chance of salmonella

then

the probability that any one egg will not have salmonella = 5/6.

Therefore

for all 5 to not have salmonella


= (5/6)^5 = 3125 / 7776

= 0.401877 = 0.40 to 2 decimal places


REMEMBER this is the probability that NONE have salmonella


Therefore

the probability that at least one does = 1 - 0.40

= 0.60


the answer is

0.60 or 60%

6 0
3 years ago
QUICK <br><br> PLZ HELP ME UNDERSTNSD
alex41 [277]

Answer: 37.05m^2

Step-by-step explanation:

Area of shaded region = Area of rectangle - non shaded region (the middle shapes)

Rectangle = 13.7 x 14.4 = 197.28m^2

Left half circle: 3.14 x 6.3^2 = 124.6266m^2

Right half circle: 3.14 x 2.8^2 = 24.6176m^2

Square: 3.3^2 = 10.98 m^2

197.28 - ( 124.63 + 24.62 +10.98 ) = 37.05 m^2

7 0
3 years ago
Read 2 more answers
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