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Anestetic [448]
3 years ago
10

HELP PLEASE 15 POINTS AND MARKED A BRAINLEST I KEEP PROMISES PLEASE HELP 5 MINTES

Mathematics
2 answers:
kifflom [539]3 years ago
7 0

your answer is c my dude

dmitriy555 [2]3 years ago
4 0
C because subtracting a negative from a positive is the same as adding two negatives. 
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Step-by-step explanation:

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There are 15 books on a shelf. 9 of these books are new. The rest of them are used. what is the ratio of all books​
Andrew [12]

Answer:

a)15:6 b)2:3

Step-by-step explanation:

No. of used books=15-9=6

a) 15:6

b)

6:9

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2 years ago
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Can someone help me with a series of questions?
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Answer:

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3 years ago
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The LCM of two numbers is 60. Their GCf is 6 and their difference is 18. What are the two numbers?
Aliun [14]
LCM(x,y)=60\\
GCF(x,y)=6\\
x-y=18\\\\
LCM(x,y)=\dfrac{|x\cdot y|}{GCD(x,y)}\\
60=\dfrac{|x\cdot y|}{6}\\
|x\cdot y|=360\\\\\\
|x\cdot y|=360\\
x-y=18\\\\
|x\cdot y|=360\\
x=18+y\\\\
|(18+y)\cdot y|=360\\
|18y+y^2|=360\\
18y+y^2=360 \vee 18y+y^2=-360\\
y^2+18y+81=441 \vee y^2+18y+81=-279\\
(y+9)^2=441 \vee (y+9)^2=-279\\
y+9=\sqrt{441} \vee y+9=-\sqrt{441}\\
y=21-9 \vee y=-21-9\\
y=12 \vee y=-30\\\\
x-12=18 \vee x-(-30)=18\\
x=30 \vee x=-12\\\\
\boxed{x=30, y=12 \vee x=-12, y=-30}
4 0
3 years ago
Read 2 more answers
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