Answer would be B. Sorry if my handwriting is messy or if I didn’t explain enough
I cant see the image...but I take it that the midpoint is (9,8) and the endpoint S is (10,10) and ur looking for the other endpoint R.
midpoint formula : (x1 + x2) / 2, (y1 + y2) / 2
(10,10)....x1 = 10 and y1 = 10
(x,y)....x2 = x and y2 = y
so we sub
(10 + x) / 2, (10 + y) / 2 = 9/8
(10 + x) / 2 = 9
10 + x = 9 * 2
10 + x = 18
x = 18 - 10
x = 8
(10 + y) / 2 = 8
10 + y = 8 * 2
10 + y = 16
y = 16 - 10
y = 6
so endpoint R has coordinates of (8,6) <===
Answer:
16 + 2x
Step-by-step explanation:
Step-by-step explanation:
✧ 
- Set up an equation and solve for x :
⋆
[ Exterior angle is always equal to the sum of two non - adjacent interior angles ]
~Remove the unnecessary brackets
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~Add the like terms : 2x ° & 3x°
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~Move 4x to right hand side and change it's sign
~Similarly move 12 to left hand side and change it's sign
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⟶ 
⟶ 
- Now , Substituting the value of x in (4x+9)° [ Exterior angle ]
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☥ 
Hope I helped ! ツ
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