Answer:
y = -9
Step-by-step explanation:
Ok so to find the sum of interior angles the formula is
s=180(n-2)
s is sum and n is the number of sides
so this is a quadrilateral cause it has 4 sides
because of that n=4
substitute
s=180(4-2)
now you can either distribute or do pemdas but its easier and more efficient to just do pemdas
s=180(2)
s=360 degrees
Hope you could understand.
If you have any query, feel free to ask.
y=7 because if you simplify it is y =7.
Answer:
2x+12
Step-by-step explanation:
