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3 years ago

13

Thulani goes to the library every 7 days. He goes to the market every 4 days. Today, August 1, Thulani goes to both the library

and the market. How many more times will he go to both places on the same day for the remainder of the year?

1 answer:

Step2247 [10]3 years ago

6 0

Answer:

6

Step-by-step explanation:

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For this case we must find the solution of the following quadratic equation:

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Where:

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Then, the solution is given by:

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Substituting the values:

$x = \frac {-5 \pm \sqrt {5 ^ 2-4 (1) (7)}} {2 (1)}\\x = \frac {-5 \pm \sqrt {25-28}} {2}\\x = \frac {-5 \pm \sqrt {-3}} {2}$

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Thus, we have two complex roots.

Answer:

The equation has no real roots.

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Keith_Richards [23]

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3 years ago

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Which facts could be applied to simplify this expression? Check all that apply.

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