I DONT UNDERSTAND HOW TO DO THISSS PLEASE HELP
1 answer:
Answer:
inside
Step-by-step explanation:
All of the points on the circle are at distance 25 units from the center. If the questionable point is closer to the center than that, it is inside the circle.
The distance formula can be used.
d = √((x2 -x1)^2 +(y2 -y1)^2)
d = √((5 -(-5))^2 +(-24 -(-8))^2) = √(10^2 +(-16)^2) = √(100 +256) = √356
d ≈ 18.9
The point (5, -24) is inside the circle centered at (-5, -8) with radius 25.
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The equation of the circle is equivalent to d=25 using (x1, y1) as the center. It is usually written without the radical:
(x -(-5))^2 +(y -(-8))^2 = 25^2
(x +5)^2 +(y +8)^2 = 625
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Answer:
B
Step-by-step explanation:
x² - 12x + 11 = 0 ( subtract 11 from both sides )
x² - 12x = - 11
To complete the square
add ( half the coefficient of the x- term )² to both sides
x² + 2(- 6)x + 36 = - 11 + 36
(x - 6)² = 25 ( take square root of both sides )
x - 6 = ± = ± 5 ( add 6 to both sides )
x = 6 ± 5
Then
x = 6 - 5 = 1 ⇒ (1, 0 )
x = 6 + 5 = 11 ⇒ (11, 0 )