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Alex73 [517]
3 years ago
9

There are

Mathematics
2 answers:
Archy [21]3 years ago
7 0
17 books in total, and 8 new. To find the number of used books, we subtract 8 from 17.

17-8= 9 used books

Now we have 8 new books and 9 used books.

All books: 17
Used books: 9
New books: 8

(a) all books: used books
     17: 9

(b) new books: used books
     8: 9
IgorC [24]3 years ago
6 0
17 books
You would do 17-8
= 9 used books
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Help please asap!!!!!!​
Free_Kalibri [48]

Answer: i would help but i have no idea but i think its (a)

Step-by-step explanation:

add the a´s first then the b´s

7 0
3 years ago
The exact value of cos 13pi/8 is
Naily [24]

Answer:

answer is : Cos(13pi/8) = 0.3826  

Step-by-step explanation:

We have, Cos (13pi/8)

Since 13pi/8 can be shown as 3pi/2 < 13pi/8 < 2pi

Hence 13pi/8 lies on fourth quadrant.

In fourth quadrant cosine will be positive.

Cos (13pi/8) = cos(3pi/2 + pi/8)

applying formula cos(A+B) = cos A cosB - sinAsinB

i.e Cos(3pi/2 + pi/8) = cos(3pi/2)cos(pi/8) - sin(3pi/2)sin(pi/8)

∵ Remember cos(3pi/2) =0 , sin(3pi/2) = -1

     Cos(3pi/2 + pi/8) = 0 cos(pi/8) - (-1)sin(pi/8)

     Cos(3pi/2 + pi/8) = 0  + 0.3826

      Cos(3pi/2 + pi/8) = 0.3826

Hence we got Cos(13pi/8) = 0.3826                          

6 0
3 years ago
Read 2 more answers
What is the distance in feet if you runs 8.05 kilometers every day?
Sveta_85 [38]
You run 26410.76 ft every day
8 0
3 years ago
Heeellllppp~ I beg you, I'm crying~ because I have been waiting for a long time now and I have asked this question multiple time
sp2606 [1]

Answer:

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Step-by-step explanation:

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6 0
3 years ago
What angle has a tangent and sine that are both negative? <br><br> 300<br> 210 <br> 45 <br> 150
zimovet [89]

Answer:

300^{\circ}

Step-by-step explanation:

\text{In quadrant IV, both ratios of tangent and sine  are negative.}\\ \\300^{\circ}~ \text{lies in the fourth quadrant, so}~ \tan 300^{\circ}  ~ \text{and}~ \sin 300^{\circ}~ \text{are negative.}

6 0
2 years ago
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