His score changed by 110 points.
Explanation: 3*30=90 & 200-90=110 points
Answer:
All real numbers.
Step-by-step explanation:
Since this is a quadratic function, that means the domain is all real numbers.
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-2[9 - (x + 7)]
-2[9 - x - 7]
-2[-x + 9 - 7]
-2[-x + 2]
-2[-x] - 2[2]
2x - 4
The answer is C.