General ntes for ESAT

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Last updated 11:15 AM on 7/17/26
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5 Terms

1
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  • Unit cost is cost of one item

  • In an elastic collision, u1-u2=v1-v2

2
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  • To check whether a number is divisible by 7, subtract twice the last digit from the other digits and see if the new number is divisible by 7.

  • When there is a common second difference, a sequence is a quadratic sequence, where a = second common difference / 2.

3
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Sum of internal angles of a polygon = 180 x (n-2)

4
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  • s = 0.5 (u+v)t

5
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