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Andre45 [30]
2 years ago
11

Hector records his reading times in a journal. His two reading times are 33.56 min and 41.98 min. Liam records his reading times

as well. His two reading times are 31.61 min and 42.08 min. How many minutes more is Hector's total reading time than Liam's total reading time? Enter the answer as a decimal in the box.
Mathematics
1 answer:
hjlf2 years ago
6 0
33.56 plus 41.98 = 75.54(total reading time for Hector)

31.61 plus 42.08= 73.69(total reading time of Liam)

75.54 minus 73.69= 1.85 more reading time than Liam

ANSWER:Hector read for 1.85 more minutes than Liam
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Find all the zeros of the equation x^4-6x^2-7x-6=0 Explain please.
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<h3>Answer:</h3>
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<h3>Step-by-step explanation:</h3>

I like to look at a graph of the function to see where the zeros might be. Here, there are x-intercepts at x=-2 and x=3. These can be factored out using synthetic division to find the factorization to be ...

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The second attachment shows my synthetic division. The first division takes out the root x=3 to give a quotient of x³ +3x² +3x +2. The second division takes out the root -2 to give the quotient of x² +x +1. (You can see that I tried -1 as a root first.)

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There is only a very complicated formula for the roots of a quartic equation, so these are usually solved by machine or by some form of trial and error (iteration). There are some helps, like Descarte's Rule of Signs, and the Rational Root theorem.

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