9514 1404 393
Answer:
B. (x +4)² +(y +5)² = 64
Step-by-step explanation:
The equation for a circle with center (h, k) and radius r is ...
(x -h)² +(y -k)² = r²
Filling in your given values, you have ...
(x -(-4))² +(y -(-5))² = 8²
Simplifying, you get ...
(x +4)² +(y +5)² = 64 . . . . . . . matches choice B
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<em>Additional comment</em>
As you learn more different "standard form" equations, it may be helpful to keep a list, along with reminders of what the variables stand for and how the equation is used.
(0.35x + 0.14 * 18) / y = 0.23
x + 18 = y
Its 11/12 , you need to divide the "wanted results" (every dog which is either black, with spots or both ) by every every possible result ( all dogs ). so 11/12=0.92
9514 1404 393
Answer:
- 127.32 yards diameter
- 12,732.4 square yards area
Step-by-step explanation:
The diameter can be found from the circumference using the relation ...
C = πd
d = C/π = (400 yd)/π ≈ 127.32 yd . . . . diameter
The area is ...
A = πr²
where the radius (r) is half the diameter.
A = π(63.662 yd)² ≈ 12,732.4 yd² . . . . area
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<em>Additional comment</em>
We have used a full-precision value for pi. If you use 3.14, your answers will be different. Your diameter will be about 127.4 yards; your area about 12,738.9 yd².