Use the distance formula:
x2 is 1 and x1 is -2
y2 is root7 and y1 is 0
Point (X1,Y1) is basically the coordinate of the centre point of the circle
Point (X2,Y2) is the point that on the circle
So if the point(1,root7) is on the circle, the final distance you get should be the radius of the circle, which is 4 units
Calculate it and you can get the answer that is 4
Therefore the point (1,root7) is on the circle
Answer:
Lets take all factors into consideration first
The door is a rectangle and the area of a rectangle is length times width
Let the width be w
Let the length be l
Equation length × breadth = area
(w+48)w = 3024
w^2 + 48w = 3024
w^2 + 48w - 3024 = 0
w^2 + 84w - 36w - 3024 = 0
w(w + 84) -36 ( w + 84) = 0
(w + 84) (w - 36) = 0
w + 84 = 0 AND w - 36 =0
w = -84 and w = 36
Since width cannot be negative, the right answer is 36
How did I get 84 and 36? Well, I had to factorize 3024 and since 84 times 36 is 3024 and 84 minus 36 is 48, I chose them.
Answer:
4ft
Step-by-step explanation:
The solution for k would be 12
