Answer:
See below
Step-by-step explanation:
1)

2)

Equating like terms on both sides:
Solving equations (1) & (2), we find:
A = 5, B = 7

Answer:
b
Step-by-step explanation:
Answer:
19/100
It's because it is the answer
Answer:
D
Step-by-step explanation:
The opposite angles of the inscribed quadrilateral are supplementary
∠A + ∠C = 180 and ∠B + ∠D = 180
∠B + ∠D = 93 + x + 30 = x + 123, hence
x + 123 = 180 ( subtract 123 from both sides )
x = 57 → D