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malfutka [58]
3 years ago
14

Can somebody help me? and explain how to do this?

Mathematics
1 answer:
disa [49]3 years ago
8 0

Answer:

The correct answer is last option

2n + m√n - nm

Step-by-step explanation:

It is given an expression,

4√n² + √m²n -  √4n² - √mn²

<u>To simplify the expression</u>

4√n² + √m²n -  √4n² - √mn² = 4n + m√n -2n -nm

= 4n - 2n + m√n - n√m

= 2n +  m√n - n√m

Therefore the correct answer is last option

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slamgirl [31]

Answer:

a) A U B = {21,23,24,25,27,29,30,31 }

b) A n C = {24,30}

Step-by-step explanation:

A {21,24,27,30}

B {21,23,25,27,29,31}

C {20,22,24,26,28,30,32}

a) A U B = {21,23,24,25,27,29,30,31 }

b) A n C = {24,30}

5 0
3 years ago
Above are two different models of the same triangular-shaped garden. If the height of the model on the left is 14 cm, what is th
Katyanochek1 [597]

Please consider the attached graph.

We have been given that there are two different models of the same triangular-shaped garden. The height of the model on the left is 14 cm. We are asked to find the height of the model.

First of all, we will convert 14 cm into feet.

We can see that model on left side has a scale of 1 cm is equal to 15 feet.

14 cm = 14×15 feet = 210 feet.

We can see that model on the right side has a scale of 1 cm is equal to 7.5 feet.

Since both models represent same triangular-shaped garden, so the actual height for the both models will be same.

Now we need to convert actual height of 210 feet into inches using 2nd scale.

\text{210 ft}=210\text{ ft}\times \frac{1\text{ inch}}{\text{7.5 ft}}=\frac{210}{7.5}\text{ inch}=28\text{ inch}

Therefore, the height of the model on right is 28 inches.

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3 years ago
What is the square of 5y?
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Answer:

<h3>25y^2</h3>

Step-by-step explanation:

(5y)^2\\\\\mathrm{Apply\:exponent\:rule}:\quad \left(a\times\:b\right)^n=a^nb^n\\\\\left(5y\right)^2=5^2y^2\\\\5^2=25\\\\=25y^2

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