In a quadrilateral the angles should add up to 360 degrees.
360-80-90-103= 87
So 87 degrees
Answer:

Step-by-step explanation:
Given

= 
=
×
← cancel (x + 50)(x + 1) on numerator/denominator
= 
Answer:
16r+27-s hope it help you with the answer
Answer:
RK: 4 and BC: 6
Step-by-step explanation:
SImilar triangles
find unknown / know sides
Which means (2x+2)/6 = (4x+2)/9
(X+1)/3 = (4x+2)/9
Multiply 9 to both sides
9/3 (x+1) = (4x+2)
3x+3 = 4x+2
1 = x
The slope of the points is -4x