First find the radius of circle A. You know that the equation is r^2*pi, so just divide both by pi.
r^2*pi=16pi
/pi /pi
r^2=16
R is 4. That means that circle B is 2, since its radius is half that of circle A.
C=pi2r
C=pi2(2)
C=pi4
C=4pi
The answer is 4pi.
Answer:
3 = k
Step-by-step explanation:
Step 1: Write equation
4 - 7k = 1 - 6k
Step 2: Solve for <em>k</em>
<u>Add 7k on both sides:</u> 4 = 1 + k
<u>Subtract 1 on both sides:</u> 3 = k
Answer:
5t+20
Step-by-step explanation:
Answer:
D
Step-by-step explanation:
First, put the equation 2x + y = 4 into mx + b = y form.
2x + y = 4
-2x -2x
y = -2x + 4
Since your m is -2, the slope is suppose to be negative. So you can cancel out choices A and B. (They show a positive slope.)
Since your y is positive 4, look on the graph the has a line going through positive 4 on the y-axis.
D is your answer.
Answer:
3x - 14 = y
Step-by-step explanation:
The equation of the line parallel to a given line ax + by + c₁ = 0 is ax + by + c₂ = 0.
In other words, equation of parallel lines differ only in their constants.
Now the given line is: 3x + 4 = y.
This can be written as: 3x - y + 4 = 0. Therefore, the line parallel to this would be: 3x - y + c = 0.
Since the point passing through the line is given, that point should satisfy this equation. So, it can used to find the values of c.
Substituting (4,-2) in the equation we get: 3(4) - (-2) + c = 0
⇒ c = -14
Substituting this we get: 3x - y -14 = 0.
or, 3x -14 = y
