What cubed equals 0.001

Consider equation of circle x2-2x+y2-4y-4=0,if line 2x-y+a=0 is its diameter then find value of a

g100num [7]

Answer:

Step-by-step explanation:

x² - 2x + y² - 4y - 4 = 0

x² - 2x + y² - 4y = 4

complete the squares

(x² - 2x + x₀) + (y² - 4y + y₀) = 4

the unknown number will be the square of half of the x¹ coefficient

(x² - 2x + 1) + (y² - 4y + 4) = 4 + 1 + 4

(x - 1)² + (y - 2)² = 9

This tells us that the circle is centered on (1, 2)

Which is also a point on the diameter

2x - y + a = 0

a = y - 2x

a = 2 - 2(1)

a = 0

4 0

3 years ago

What is the numerical expression for the phrase? <br><br> Add 17 to the product of 3/4 and 12

nevsk [136]

Product = multiply

3/4 x 12 = 9
17 + 9 = 26

4 0

3 years ago

Read 2 more answers

What is the lateral area of a cone with radius 19 cm and slant height 11 cm?

konstantin123 [22]

<span>I did the 38 times pi and got 119.3805 then multiplied it by 11 To get 1313.1855 Then divided by 2= 656.59275 And divided by pi 208.9999 Then round up.</span>

3 0

3 years ago

Read 2 more answers

15x − 2 =? please help

pentagon [3]

Answer:

I cant tell is the 'x' is supposed to be a variable or a multiplication sign. IF its a multiplication sign then the answer is -30. Btu if its a variable then its in its simplest form there isn't any way to solve that equation.

8 0

3 years ago

[calculus] the distance from the point (6, -4) to the circle <img src="https://tex.z-dn.net/?f=x%5E2%2By%5E2-8y%3D0" id="TexForm

stealth61 [152]

Answer:

Option C.

The distance from the point to the circle is 6 units

Step-by-step explanation:

we know that

The distance between the circle and the point will be the difference of the distance of the point from the center of circle and the radius of the circle

step 1

Find the center and radius of the circle

we have

$x^{2} +y^{2}-8y=0$