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3 years ago

At an aquarium, 6 out of 18 deliveries were plants. Out of 15 deliveries in one week, how many are plants?

Mathematics

1 answer:

OverLord2011 [107]3 years ago

3 0

The answer would be 5 deliveries. 6/18 = 1/3. 5/15 = 1/3.

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Factor Completely x^4-2x^2y^2+y^4

12345 [234]

<h3>Answer :</h3>

$\bf (x+y)^2(x-y)^2$

==============

<h3>Solving Steps:</h3>

===============

$\rightarrow \sf x^4-2x^2y^2+y^4$

<u>breakdown</u>

$\rightarrow \sf x^4-x^2y^2-x^2y^2+y^4$

<u>factor common term</u>

$\rightarrow \sf x^2(x^2-y^2)-y^2(x^2-y^2)$

<u>collect in groups</u>

$\rightarrow \sf (x^2-y^2)(x^2-y^2)$

<u>apply difference between two square method:</u> x² - y² = (x+ y)(x-y)

$\rightarrow \sf (x+y)(x-y) (x+y)(x-y)$

<u>simplify</u>

$\rightarrow \sf (x+y)^2(x-y)^2$

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2 years ago

Steve built a square hamster pen that has a perimeter of

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The length of one side is 60 centimeters

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4 years ago

Does 9 thousand equal 90 thousand

Dovator [93]

Answer:

Step-by-step explanation:

9000 has three zeros

whereas 90,000 has four zeros

when you multiply 9000 with 10 ,you get 90 thousand

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3 years ago

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Emma buys packets of coloured beads.

Nataliya [291]

Answer:

yes

Step-by-step explanation:

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4 years ago

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Elias and Niko are polishing the silver at the heritage museum.Elias could polish all the silver himself in 40 minutes.That task

irina1246 [14]

Let x be the time it takes Elias and Niko to polish the silver working together. If Elias works alone, he could polish all the silver himself in 40 minutes. Then, in 1 minute, he will make $\frac{1}{40}$ of the total work. If the same analysis is applied Niko, in 1 minute, will make $\frac{1}{50}$ of the total work.

Working together Elias and Niko will need x minutes to make all the work. Then, in 1 minute, they will make $\frac{1}{x}$ of the total work. So, the fraction of the total work they make in 1 minute is given by this equation:

$\frac{1}{x}=\frac{1}{40}+\frac{1}{50} \\ \\ \frac{1}{x}=\frac{50+40}{2000} \\ \\ x=\frac{2000}{90} \\ \\ \boxed{x=22.22 minutes}$

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3 years ago

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