Holly collects video games. She starts with 3x3 games, for some number x, and then buys another 7x4 She then gives away x?, then sells 5x, and finally donates
another 9 games. Write an expression for the number of games Holly now has in
standard form.
0-9 – 5x – x2 + 3x3 + 7x4
7x4 + 3x3 – 22 – 5x – 9
-9 + 7x4
5x + 3x3
22
O
3x3 – 5x + 7x24 – 9 – 22
3x^3-5x+7x^4-9-x^2

Which is an equation for the nth terms of the sequence 12,15,18,21

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