Answer:
Step-by-step explanation:
By the Pythagorean theorem, the unknown side has length
Therefore,
20.428571
C=(22/7)d
C=(22/7)6.5
C=20.428571
-12x + 8 + 5x =36
-7x = 36 - 8
-7x = 28
x = 28/-7
x = -4