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olasank [31]
3 years ago
14

What is a best estimate for $21.15 $19.89 $6.52

Mathematics
1 answer:
STALIN [3.7K]3 years ago
3 0
$21 for the first. $20 for the second and $7 for the third
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Answer:

The value of k is -9

Step-by-step explanation:

Subsitute

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x^2-6=x^2+3+k

subtract x^2+3 from both sides (or add -x^2-3 to both sides)

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