3 years ago

Find the final price of a $149.99 smart watch with 8.5 sales tax

Mathematics

1 answer:

Talja [164]3 years ago

6 0

Answer:

167.64

Step-by-step explanation:

To evaluate the tax add on, divide 149.99 by 8.5 which divided and rounded is 17.65
add 17.65 and 149.99

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If a number is increased by its square, the result is 72 find the number

gregori [183]

Translating into a mathematical equation:

n + n^2 = 72

Rewriting, n^2 + n - 72 = 0
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Solving for n: n = -9 or n = 8

You must check both answers before accepting one, the other or both.

Example: suppose we check out n = 8. Then 8 + 8^2 = 72 is true, and n = 8 is a solution. Is n = -9 a solution? Try it.

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2 years ago

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kicyunya [14]

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