You could have half a cookie, divide it into thirds. (a semi circle cut into thirds)
Answer:

Step-by-step explanation:

Collect like terms
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Calculate
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Hope I helped!
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N and n+2 because if n=1 then you do 1+2 and that equals 3. So then you have 1,3
Answer:
linear and non-proportional
Step-by-step explanation:
When the same amount is added each week, the relationship is linear. When the initial value is 50, not zero, the relationship is non-proportional.