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3 years ago

15

What is the least common denominator of 9/15 and 2/3

1 answer:

eduard3 years ago

3 0

Answer:5

Step-by-step explanation:

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Use models to prove that 3 (a+b) is equivalent to 3a + 3b.

mezya [45]

The 3 is distributed to the a+b inside the brackets........

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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

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1/x^-2 x=7 yeet yeet

Yanka [14]

Answer:

49

Step-by-step explanation:

x = 7

1 / x^-2

= x^2

= 7^2

= 49

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The store owner tells the girls that half of the DVDS are out on loan. How many DVDS does the store own in total?

patriot [66]

3

Step-by-step explanation:

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2 years ago

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yanalaym [24]

Y=29
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