8x - 9y = 11 (subtract 8x from each side)
- 9y = -8x + 11 (divide -9 from each side)

y =
D.
Answer:
T'(2, - 5 )
Step-by-step explanation:
Under a rotation about the origin of 180°
a point (x, y ) → (- x, - y ), thus
T(- 2, 5 ) → T'(2, - 5 )
39/120 = x / 1800....39 choc. chip to 120 students = x choc. chip to 1800 students
now we cross multiply because this is a proportion
(120)(x) = (39)(1800)
120x = 70200
x = 70200/120
x = 585 <===
or u could do it this way as well...
39 out of 120 picked chocolate chip....
39/120 = 0.325 = 32.5%....so 32.5% chose chocolate chip.
32.5% of 1800 = 0.325(1800) = 585 <==
Answer: the answer is 12 cm