There are no numbers for this, thus you will have to use the quadratic formula.
Answer:
D im not sure but i hope its right
Step-by-step explanation:
X+ 4? idk I don't really understand the question...
Answer:70 degrees and 150 degrees
Step-by-step explanation: The angles of a quadrilateral add up to 360. So the sum of the two angles is 360 - (55+ 85) = 220.
After that you can model the sum of the angles with an equation:
7x + 15x = 220
22x = 220
x = 10
then you plug in x for each angle 7(10) = 70 and 15(10) = 150