Answer:
Step-by-step explanation:
x+(-56)=12
exclude "x"
x=56+12
x=68
Answer:
Y=x^2-2x-8
Step-by-step explanation:
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Because the cos theta < 0 then theta must be an obtuse angle
so a^2 + b^2 < a^2
C
NQS= 30
you just subtract 78-48 to get 30