Answer:
see attachment
Step-by-step explanation:
2y + y = 12
3y = 12
y = 4
now , x = 2y
x = 2 ( 4 )
x = 8
hope that helps ✌
B
1^2 + 8^2 = c^2
1 + 64 = c^2
65 = c^2
√c^2 = √65