a pelican. starts at 60 feet above sea level.it descends 60 feet to a catch fish. how do I explain it
2 answers:
The Pelican who is 60 feet above sea level is represented by +60.Now, he is trying to catch the fish which is at 0 level, means Sea level because the pelican is trying to catch the fish by descending 60 feet.
To explain this
We will take the help of Integers by representing it on the number line.
We will represent sea level by Integer 0.
⇒60 feet above sea level= +60
⇒60 feet Below = -60
Now,⇒ 60 + (-60)=0
⇒Also, 60 and -60 are additive inverses of each other, when added together yield additive Identity which is "0" for group of Integers.
→0=Sea Level
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Answer:
(x + 5)² + (y + 7)² = 288
Step-by-step explanation:
The equation of a circle in standard form is
(x - h)² + (y - k)² = r²
where (h, k) are the coordinates of the centre and r is the radius
The radius is the distance from the centre (- 5, - 7) to the point on the circle (7, 5)
Use the distance formula to calculate r
r = √ (x₂ - x₁ )² + (y₂ - y₁ )²
with (x₁, y₁ ) = (- 5, - 7) and (x₂, y₂ ) = (7, 5)
r = =
=
Hence
(x - (- 5))² + (y - (- 7))² = ()², that is
(x + 5)² + (y + 7)² = 288