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3 years ago

10

I need help and I have a answer in my head but don’t know if it’s correct. Please help me if you know

1 answer:

IgorLugansk [536]3 years ago

8 0

Answer:

The answer is 70cm2

Step-by-step explanation:

The answer is 70cm2 because you have to do 14cm times 5cm and that would give you 70. But if you would do the other triangle you would get 84cm2 so its up to you what triangle you are gong to pick the triangle that I did for you was pretty easy well both of them are easy XD

I hope that helped you.

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If the ratio of the corresponding side lengths of two similar polygons is 6:11, what is the ratio of their areas? A. 6:11 B. 12:

Harlamova29_29 [7]

The answer is D. because they are both the same ratio by squared-
6 squared is 36 and 11 squared is 121
So it's 6:11::36:121

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3 years ago

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Help with translations!

Vadim26 [7]

Given:

The figure of a trapezoid.

The figure is translated down 5 units and then rotated 180 degrees clockwise.

To find:

The coordinates of the image of point W after these transformation.

Solution:

From the given figure it is clear that the coordinates of point W are (-6,3).

The figure is translated down 5 units. So,

$(x,y)\to (x,y-5)$

$W(-6,3)\to W'(-6,3-5)$

$W(-6,3)\to W'(-6,-2)$

After that the figure is rotated 180 degrees clockwise.

$(x,y)\to (-x,-y)$

$W'(-6,-2)\to W''(6,2)$

Therefore, the coordinates of point W after the given transformations are (6,2).

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3 years ago

Write and solve an inequality<br> thirty is less than the sum of a<br> number x and 8.

VashaNatasha [74]

Answer:

30<x+8 and 22<x

Step-by-step explanation:

subtract 8 from 30 to get 22

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3 years ago

Find the standard deviation. Round to the nearest tenth. 1, 2, 11, 8, 16, 16,20, 16, 18 OA. 6.5 O B. 6.9 O C. 1.5 ? D. 7.4

NikAS [45]

Answer:

A. 6.5

Step-by-step explanation:

First we find the average $\bar{x}$ of the 9 data:

$\bar{x} =\frac{\sum_{x=1}^{n}x_{i}}{n}$

Where n is the data number, that in this case is 9.

$\bar{x} =\frac{1+ 2+ 11+ 8+ 16+ 16+20+ 16+ 18}{9}=12\\$

The formula of the standard deviation $\sigma$ is:

$\sigma=\sqrt{\frac{\sum_{x=1}^{n}(x_{i}-\bar{x})^{2}}{n}}$

We replace the data and find the value of the standard deviation:

$\sigma=\sqrt{\frac{(1-12)^{2}+(2-12)^{2}+(11-12)^{2}+(8-12)^{2}+(16-12)^{2}+(16-12)^{2}+(20-12)^{2}+(16-12)^{2}+(18-12)^{2}}{9}}$

$\sigma=\sqrt{\frac{(-11)^{2}+(-10)^{2}+(-1)^{2}+(-4)^{2}+(4)^{2}+(4)^{2}+(8)^{2}+(4)^{2}+(6)^{2}}{9}}=6,54$

We approximate the number and the solution is 6,5

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4 years ago

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mestny [16]

Answer:

x=1

Step-by-step explanation:

To solve this question we will have to open the bracket first

So let's solve

3(x-5)=18

Open the bracket

3x-15=18

Add 15 to both sides

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Make x the subject of formula by dividing both sides by 3

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3 years ago

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