Expand out, this literally just wants you to multiply everything by -1.
so 7*-1 = -7
-c*-1 = c
thus putting them together to get -7+c which is just c-7
25% of the circles are shaded. You would find this by dividing 3/12! Have a good day!
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I hope this helps you
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20 as it is a positive number
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I'm pretty sure It's 2172.20 (I may be wrong It's been a while since I did this)
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