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➷ Use the geometry rule:
(|(20(-2) - 21(3) - 42|) / square root of 20^2 + (-21)^2
Now you get:
(x + 2)^2 + (y - 3)^2 = 5^2
This can also be written as:
x^2 + 4x + y^2 - 6y - 12.
It would be option B
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question 4: the answer is 1/2
question 5: the answer is 58/79
So if the necklace was $27 then we need to do 67.50-27=40.50, so that mans each of the bracelets cost $20.25.
36/-9-5=14/7-11
36/-9=-4
-4-5=-9
14/7=2
2-11=-9
He made $2.80 because if you multiply 70 by .04 it’s 2.8