Expand and simplify the following polynomial. be sure to write it in standard form. -6y(3y^2-2y-7)
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<em>Data</em>
• Morning: 156 times
,• Lunch: x times
,• Afternoon: 201 times
,• Whole day: 562 times
<em>Procedure</em>
To know how many times did it ring at lunch, we have to build a relation, in which we know that the addition of the times in the morning, lunch, and afternoon equal the times it rang the whole day:
Then, we have to solve for <em>x </em>considering that it represents the times it rang during the lunch.
Answer: It rang 205 times during the afternoon.