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Answer:</h3>
x² + y² = 50
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Step-by-step explanation:</h3>
The circle centered at (h, k) with radius r has equation ...
... (x -h)² + (y -k)² = r²
You have (h, k) = (0, 0), so all we need to do is find r². We can do that by choosing r² so that the equation is true at the given point.
... x² + y² = (5)² + (-5)² = 25 + 25 = 50
Your equation is x² + y² = 50.
Answer:
Swimming one time around the pool is 56.5 ft
Step-by-step explanation:
Swimming 18 ft from one side of her circular pool to the other, swimming straight through the center means the circular swimming pool has a diameter of d=18 ft.
The circumference of the circle is calculated using:
where d=18 is the diameter and π=3.14 as given.
We substitute the values to get:
We approximate to the nearest tenth to get:
Answer:
-84/3
Step-by-step explanation:
Here we are given the expression:
Now we have to find the value of this expression when x equals -9.
So plugging the value of x as -9 in the given expression:
=
=84/-3
So on evaluating we get the value of expression as -84/3.
Time = distance/speed
time = 2 / 0.1
t = 20 minutes