Answer:
Your anwser would be D 
Jacki did not subtract 12 from 8 correctly.
Step-by-step explanation:
It should be a negative instead of a positive 
 
        
                    
             
        
        
        
Answer:
(x,y) = (-36,6)
Step-by-step explanation:
-6y=x
x+y=-30
x=-6y,
so -6y+y=-30
-5y=-30
y=6
x=-36
Hope this helps pls hit the crown :D
 
        
             
        
        
        
Answer:
1 and 2.
Midpoints calculated, plotted and connected to make the triangle DEF, see the attached.
- D= (-2, 2), E = (-1, -2), F = (-4, -1)
3. 
As per definition, midsegment is parallel to a side.
Parallel lines have same slope.
<u>Find slopes of FD and CB and compare. </u>
- m(FD) = (2 - (-1))/(-2 -(-4)) = 3/2
- m(CB) = (1 - (-5))/(1 - (-3)) = 6/4 = 3/2
- As we see the slopes are same
<u>Find the slopes of FE and AB and compare.</u>
- m(FE) = (-2 - (- 1))/(-1 - (-4)) = -1/3
- m(AB) = (1 - 3)/(1 - (-5)) = -2/6 = -1/3
- Slopes are same
<u>Find the slopes of DE and AC and compare.</u>
- m(DE) = (-2 - 2)/(-1 - (-2)) = -4/1 = -4
- m(AC) = (-5 - 3)/(-3 - (-5)) = -8/2 = -4
- Slopes are same
4.
As per definition, midsegment is half the parallel side.
<u>We'll show that FD = 1/2CB</u>
- FD =  = = = = 
- CB =  = = = 2 = 2 
- As we see FD = 1/2CB
<u>FE = 1/2AB</u>
- FE =  = = = = 
- AB =  = = = 2 = 2 
- As we see FE = 1/2AB
<u>DE = 1/2AC</u>
- DE =  = = = = 
- AC =  = = = 2 = 2 
- As we see DE = 1/2AC
 
        
                    
             
        
        
        
Answer:
2.5 pi
Step-by-step explanation:
Comment
If you were trying to get the area of a whole circle, you would use 
Area = pi r^2
You have to modify the formula to show that just part of the circle has an area that you are interested in.
The new formula is
Area = (theta/360) pi r^2
Givens
r = 30 cm
theta = 100 
Solution
Area = (100 / 360) * pi * r^2       Substitute the givens into this formula
Area = (5 / 18) * pi * 3^2              Expand
Area = (5 / 18) * pi * 9                  Cancel 9 into 18
Area = 5/2 * pi
Area = 2.5 * pi
 
        
             
        
        
        
Answer:
4n^2
Step-by-step explanation:
n to the power of 2 (squared), multiplied by 4