Answer:
Step-by-step explanation:
OK, lets start by drawing a basic graph (the first one) so we can visualize.
We already know that the y coordinate of the circle's center is .
We know that the circle is tangent to the axis at
That means the x coordinate of the center has to be , as the tangent is a point on the edge of the circle that touches a line at exactly one point.
The radius is the distance from the center of the circle to its edge. We know the center's location now, it is and a point on the edge of the circle (the tangent point) which is . so the distance between the points is 4 which is the radius (you can use the distance formula, but it's quite oblivious.)
We can imagine the circle should look like this (the second one):
Now we can piece together an equation
The equation of a circle is where is the center and is the radius. When we put the numbers in: we get which can be simplified into which is the answer.
-4x + y = 10
y = 4x + 10
Slope = 4
x=3, y = 4*3 + 10 = 22
I think the answer is 126.6466666666667but rounded be 126.65
It is 8 percent of 50.
This is 1 way-
<span>4/50=%/100 You now have a proportion. Cross multiply.
50%=400 Replace % with any variable.
50x=400 Now divide both sides of the equation by 50.
x=8
</span><span>
(% is basically the percentage of 4 of 50 over 100. its much easier to solve </span>percentage problems when the percentages are over 100. 100 represents a full percentage.
example- 4 of 100 is 4% of 100)
2nd example-
Since the percentage can be found if over 100 as well (%/100), and since 100 is a multiple of 50, we can do 4 of 50 (which would look like 4/50) and multiply both numbers by 2 to get the percentage. These are our steps:
<u />4/50× 2/2=
8/100
Therefore, 4 of 50 is 8% of 50