Answer:
<h3><u>Part (a)</u></h3>
<u />
<u>Equation of a circle</u>

where:
- (a, b) is the center 
- r is the radius
Given equation:  
Comparing the given equation with the general equation of a circle, the given equation is a <u>circle</u> with:
- center = (0, 0)
- radius =  
To draw the circle, place the point of a compass on the origin. Make the width of the compass 2.5 units, then draw a circle about the origin.
<h3><u>Part (b)</u></h3>
Given equation:  
Rearrange the given equation to make y the subject:  
Find two points on the line:


Plot the found points and draw a straight line through them.
The <u>points of intersection</u> of the circle and the straight line are the solutions to the equation.
To solve this algebraically, substitute   into the equation of the circle to create a quadratic:
  into the equation of the circle to create a quadratic:



Now use the quadratic formula to solve for x:



To find the coordinates of the points of intersection, substitute the found values of x into 


Therefore, the two points of intersection are:

Or as decimals to 2 d.p.:
(2.35, -0.85) and (-0.85, 2.35)
 
        
             
        
        
        
Answer:

Step-by-step explanation:
To write the equation of a circle, use the formula  where the center of the circle is (h, k).
 where the center of the circle is (h, k).
This means the equation is  .
.
Find the radius r by dividing the diameter of 10 in 2. The radius is 5.
So the equation of the circle is 
 
        
             
        
        
        
Obtuse triangle if that’s what you’re asking
        
             
        
        
        
Answer:    $52 x 4 =230,464    $110 x 979 = 107,690.         ESTIMATED ANSWER: 300,000
230,464
+107,690= 338,154                
Step-by-step explanation: Hope this helped you!
 
        
             
        
        
        
I think it’s A I’m not sure