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emmainna [20.7K]
2 years ago
11

Zoey read a novel in 30 days she made it a habit to read 13 pages everyday for the first 20 days. if in the last 10 days she rea

ds 6 pages everyday how many pages are in the book?
Mathematics
2 answers:
Whitepunk [10]2 years ago
8 0

Answer:

320 pages.

Step-by-step explanation:

We can simply multiply and add to find how many pages are in the book.

So we have (13 pg * 20 d) + (6 pg * 10 d) = 260 + 60 = 320.

Another way of solving is to set up a proportion for both the 20 and 10 days, find how many pages are read on these days, and add:

\frac{13pg}{1d}=\frac{xpg}{20d}\\ x=260pages\\\\\frac{6pg}{1d} =\frac{xpg}{10d}\\ x=60pg\\260+60=320

Elden [556K]2 years ago
7 0
Answer:320

Explanation:

20 days times 13 pages= 260pages
10 days times 6 pages = 60pages

Total for the 30 days:
260+60= 320 pages total
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mario62 [17]

Answer:

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Step-by-step explanation:

If one root is -7i, another root must be 7i.  You can't just have one root with i.  The other roos is √2, so there are 3 roots.  

x = -7i       is one root,

   (x + 7i) = 0    is the factor

x = 7i       is one root

  (x - 7i) = 0     is the factor

x = √2      is one root

    (x - √2) = 0   is the factor

So the factors are...

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Multiply these out to find the polynomial...

(x + 7i)(x - 7i) =  x² + 7i - 7i - 49i²

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Now we have...

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Now foil this out...

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7 0
3 years ago
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