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gizmo_the_mogwai [7]
3 years ago
9

I need help with this​

Mathematics
1 answer:
Alika [10]3 years ago
5 0

Answer:

i am sorry but i dont know

Step-by-step explanation:

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What is the radius of a circle with the equation x^2+y^2+6x-2y+3?
atroni [7]

Answer:

r = √13

Step-by-step explanation:

Starting with x^2+y^2+6x-2y+3, group like terms, first x terms and then y terms:  x^2 + 6x            + y^2 -2y             = 3.  Please note that there has to be an " = " sign in this equation, and that I have taken the liberty of replacing " +3" with " = 3 ."  

We need to "complete the square" of x^2 + 6x.  I'll just jump in and do it:  Take half of the coefficient of the x term and square it; add, and then subtract, this square from x^2 + 6x:     x^2 + 6x  + 3^2 - 3^2.  Then do the same for y^2 - 2y:  y^2 - 2y + 1^2 - 1^2.

Now re-write the perfect square x^2 + 6x + 9 by (x + 3)^2.  Then we have x^2 + 6x + 9 - 9; also y^2 - 1y + 1 - 1.  Making these replacements:

(x + 3)^2 - 9 + (y - 1)^2 -1 = 3.  Move the constants -9 and -1 to the other side of the equation:  (x + 3)^2 + (y - 1)^2 = 3 + 9 + 1 = 13

Then the original equation now looks like (x + 3)^2 + (y - 1)^2 = 13, and this 13 is the square of the radius, r:  r^2 = 13, so that the radius is r = √13.


8 0
3 years ago
Read 2 more answers
What is the slope of the line threw (-7,-2) and (-6,7)
miv72 [106K]

Answer:

9

Step-by-step explanation:

To find the slope of a line, calculate the distance between points with a ratio of vertical to horizontal distance. This is done using the formula:

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

Here the points are (-7,-2) and (-6,7). Substitute and simplify.

m=\frac{7--2}{-6--7}=\frac{7+2}{-6+7}=\frac{9}{1}=9

3 0
3 years ago
HELP PLSS !!! Will mark as brainiest
Natasha_Volkova [10]

Answer:

1709.92cm^3

Step-by-step explanation:

V=\pi r^2h=\pi *3^2*7=197.92cm^2 (cylinder)

V=whl=14*9*12=1512cm^3(rectangular prism)

197.92+1512=1709.92cm^3(whole shape)

5 0
3 years ago
Identify the slope and y-intercept of y=-5x
Alika [10]
The slope is 5.
And the y-intercept is 0.

Hope I helped! <3
4 0
3 years ago
The conditional relative frequency table was generated using data that compares the favorite subjects of male and female student
Rudik [331]

Answer:

I would say 60 students said that math was their favorite subject...

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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