Answer:
y = 0 is the midline equation.
Step-by-step explanation:
The midline equation of y = 2 sin( pi/2 x+3) is the same as that of
y = 2 sin( pi/2 x+3) or y = sin( pi/2 x+3), and is
y = 0.
Another expression: 9*(4a - 3)
Though 36a - 27 is the simplest form we can factor it
36a - 27 = 9* (4a - 3)
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