Angles C and D are supplementary, or they add up to 180. 
b = 180 - 75 - (180 - 127)
Hope this helps!
 
        
                    
             
        
        
        
Answer:
Please read explanation below. 
Step-by-step explanation:
Let's go over what some of the symbols of inequalities represent:
 : greater than
: greater than
 : less than
: less than
 : greater than or equal to
: greater than or equal to
 : less than or equal to
: less than or equal to
The symbol in the equation that is given to you is  . It seems as though each of the answer choices have everything written as the same thing except for the description of the inequalities. Check the one that applies.
. It seems as though each of the answer choices have everything written as the same thing except for the description of the inequalities. Check the one that applies. 
 
        
             
        
        
        
11. 2x+3x+1=21
5x+1 =21
5x=20
x=4
TU= 2(4) which is 8
UB= 3(4)+1 which is 13
12. 4x-1 +2x-1=5x
6x-2=5x
-2=-1x
2=x
X=2
TU= 7
UB= 3
TB=10
Problem 13:
2x-8=x+17
2x=x+25
x=25
AB =42
BC=42
AC=84
Problem 14:
3x-31
-x+6
=
2x-37 for BC part now we solve for x
x+6=2x-37
6=x-37
43=x
So :
X=43
AB=49
AC=98
BC=49
        
             
        
        
        
Answer:
 (x - 3)^2 + (y + 1) = 25
Step-by-step explanation:
First find the midpoint of the diameter, because that represents the center of the circle.
                                                                      -1 + 7
The x-coordinate of the midpoint is xm = ---------- = 3
                                                                           2
                                                  2 - 4
and the y-coordinate is ym = ---------- = -1
                                                      2
And so the center of this circle is at (3, -1).
Use the Pythagorean Theorem to determine the square of the radius:
square of radius = 4^2 + (-3)^2 = 16 + 9 = 25
And so the equation of this circle is (x - 3)^2 + (y + 1) = 25