The equation of a circle is:
where center is (h,k) and radius is r. Therefore, in this question, you need to check if the (h,k) values are the same. Let's view each option and judge accordingly:
A. (0,-4) and (-4,0) : Nope
B (-3,3) and (3,-3) : Nope
C. (7,2) and (-7,-2) : Nope
D. (2,5) and (2,5): Yes, the centers are equal.
Therefore, your answer is option D.
Answer: 18050cm²
Step-by-step explanation:
Let me know if it's wrong or right.
Answer:
A
Step-by-step explanation:
12 / tan 42 = 13.32......
12 / sin 27 = 26.43....
26.43² - 12² = 552.24....
square root of 552.24... = 23.5
23.5 - 13.3 = 10.2
Answer:
(–9,0)
Step-by-step explanation:
f(x) = (x – 8)(x + 9)
= x² + 9x -8x - 72
= x² + x - 72
x-intercept is a coordinate of x axis where a function cuts the x-axis. They are points where y=0 or f(x) = 0.
x² + x - 72 = (x – 8)(x + 9) = 0
∴ x – 8 = 0
x = 8
x + 9 = 0
x = -9
The required points are (8, 0) and (-9, 0).
From the choices given there is only one correct answer. (–9,0)
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