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VMariaS [17]
3 years ago
5

I'm doing a survey and need thoughts. In a classroom do you prefer to use computers or Textbooks. No explanation necessary. But

feel free if so.
Mathematics
2 answers:
Andrew [12]3 years ago
7 0
IT IS BETTER TO USE A COMPUTER BECAUSE IN TEXTBOOKS U DONT GET MUCH INFORMATION AS YOU DO IN A COMPUTER
svetlana [45]3 years ago
3 0
I prefer to use textbooks because they are reliable and never malfunction. 
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There are about 320 million people living in the United States. Of these, how many would you predict wear corrective lenses
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Answer:

240 million

Step-by-step explanation:

Google said that three out of four people wear corrective lenses which is also 75%. So whats 75% out of 320 million? <u>Half of 320 million is 160 million</u>. <u>Half of 160 million is 80 million, 160 million plus 80 million is </u><u>240 million.</u>

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solong [7]

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<em><u>Solution:</u></em>

Given that we have to solve the given equation by factoring

Given equation is:

x^2=2x + 3\\\\x^2 - 2x - 3 = 0

\text{Consider the form } x^2+bx+c

Find a pair of integers whose product is c and and whose sum is b

\text{Compare } x^2-2x-3 = 0 \text{ with } x^2+bx +c\\\\\text{We get } b = -2 \text{ and } c = -3

Now find, a pair of integers whose sum is -2 and product is -3

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When multiply -1 and 3 we get -3

Thus the pair of integers are -1 and 3

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The Zero Product Property states that if ab = 0, then either a = 0 or b = 0, or both a and b are 0

Set the factors equal to 0

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Thus the solution is x = 1 and x = -3

4 0
2 years ago
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