Answer:
![(x+3)^2+(y+11)^2=121](https://tex.z-dn.net/?f=%28x%2B3%29%5E2%2B%28y%2B11%29%5E2%3D121)
Step-by-step explanation:
Consider a sketch of the problem as shown in the picture, where:
- Blue line is given by y = 4x + 1.
- Point B is the center of the circle.
- Point A is (-3, 0).
Since the center of the circle lies on the line y = 4x +1 and is tangent to the x-axis at point A, then its radius BA is perpendicular to the x-axis. To find the coordinates of point B, we must replace x = -3 into the blue line equation: y = 4x(-3) + 1 = -11.
So, we know that the center of the circle is at B=(-3, -11). And furthermore, the radius BA is of length r=11.
Since the <em>general equation of the circle</em> of radius lenght r centered at (h, k) is given by
![(x-h)^2+(y-k)^2=r^2](https://tex.z-dn.net/?f=%28x-h%29%5E2%2B%28y-k%29%5E2%3Dr%5E2)
then with h = -3, k = -11 and r= 11, the equation of our circle is
![(x+3)^2+(y+11)^2=121](https://tex.z-dn.net/?f=%28x%2B3%29%5E2%2B%28y%2B11%29%5E2%3D121)
Answer:
7.07
Step-by-step explanation:
Answer:
28.3 (b)
Step-by-step explanation:
To solve circumference, you will need to use the equation C = 2 *pi* r
for this, we will use 3.14 for pi and the radius is 4.5 so this is how we need to solve it
C= 2 pi (4.5) Solve 2*4.5
C= 9 pi Now we input 3.14 for pi and multiply
C= 9(3.14)
C= 28.26 Now we round to the nearest tenth to get
C=28.3
Answer:
V = 65.548 cm³
Step-by-step explanation:
We have,
Volume of a ball is 4 cubic inches or
.
We know that, 1 inch = 2.54 cm
It is required to convert this volume to cubic centimetre or
.
![4\ \text{inch}^3=4\ \text{inch}^3\times (\dfrac{2.54\ \text{cm}}{1\ \text{inch}})^3\\\\V=65.548\ \text{cm}^3](https://tex.z-dn.net/?f=4%5C%20%5Ctext%7Binch%7D%5E3%3D4%5C%20%5Ctext%7Binch%7D%5E3%5Ctimes%20%28%5Cdfrac%7B2.54%5C%20%5Ctext%7Bcm%7D%7D%7B1%5C%20%5Ctext%7Binch%7D%7D%29%5E3%5C%5C%5C%5CV%3D65.548%5C%20%5Ctext%7Bcm%7D%5E3)
So, the volume of the ball is 65.548 cm³.
Answer:
Step-by-step explanation:
add a picture of the question please