By the law of cosines, the angle

satisfies

which reduces to

which converts to approximately 77 degrees (this can be done my multiplying by 180 and dividing by pi).
Answer:

Step-by-step explanation:
2(v-8) = n+y
Distribute
2v-16 = n+y
Move -16 to the other side
2v = n+y+16
Divide everything by 2

Answer:
see explanation
Step-by-step explanation:
the translation rule (x, y ) → (2x,
y )
means multiply the x- coordinate by 2 and multiply the y- coordinate by
), so
A (- 1, - 3 ) → A' (- 2, - 1 )
B (4, - 3 ) → B' (8, - 1 )
C (4, 3 ) → C' (8, 1 )
D (- 1, 3 ) → D' (- 2, 1 )
Answer:
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Step-by-step explanation: