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3 years ago

X=4/5 (x+10) pls ans fast!!!!!!!!!!!!!!!!!!!!1

Mathematics

1 answer:

8_murik_8 [283]3 years ago

7 0

Answer:

x=40

Step-by-step explanation:

x=4(x+10)÷5

x=(4x+40)÷5

5x=4x+40

x=40

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What is the perimeter of angle DEF to the nearest tenth of a unit?<br> helppppp<br> tysm

hammer [34]

<h3>Answer: 36.4 units (choice A)</h3>

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

Explanation:

Let's use the distance formula to find the distance from D to E

$D = (x_1,y_1) = (-7,2) \text{ and } E = (x_2, y_2) = (3,4)\\\\d = \sqrt{(x_1 - x_2)^2 + (y_1 - y_2)^2}\\\\d = \sqrt{(-7-3)^2 + (2-4)^2}\\\\d = \sqrt{(-10)^2 + (-2)^2}\\\\d = \sqrt{100 + 4}\\\\d = \sqrt{104}\\\\d = \sqrt{4*26}\\\\d = \sqrt{4}*\sqrt{26}\\\\d = 2\sqrt{26}\\\\d \approx 10.198\\\\$

Note: uppercase D refers to the point, while lowercase d is the distance from D to E.

The length of segment DE is roughly 10.198 units long.

----------------

Repeat for the distance from E to F.

$E = (x_1,y_1) = (3,4) \text{ and } F = (x_2, y_2) = (5,-7)\\\\d = \sqrt{(x_1 - x_2)^2 + (y_1 - y_2)^2}\\\\d = \sqrt{(3-5)^2 + (4-(-7))^2}\\\\d = \sqrt{(3-5)^2 + (4+7)^2}\\\\d = \sqrt{(-2)^2 + (11)^2}\\\\d = \sqrt{4 + 121}\\\\d = \sqrt{125}\\\\d = \sqrt{25*5}\\\\d = \sqrt{25}*\sqrt{5}\\\\d = 5\sqrt{5}\\\\d \approx 11.1803\\\\$

Segment EF is roughly 11.1803 units long.

----------------

Repeat for the distance from F to D.

$F = (x_1,y_1) = (5,-7) \text{ and } D = (x_2, y_2) = (-7,2)\\\\d = \sqrt{(x_1 - x_2)^2 + (y_1 - y_2)^2}\\\\d = \sqrt{(5-(-7))^2 + (-7-2)^2}\\\\d = \sqrt{(5+7)^2 + (-7-2)^2}\\\\d = \sqrt{(12)^2 + (-9)^2}\\\\d = \sqrt{144 + 81}\\\\d = \sqrt{225}\\\\d = 15\\\\$

Unlike the others, this result is exact.

----------------

Add up the three segment lengths to get the perimeter

DE + EF + FD

10.198 + 11.1803 + 15

36.3783

The perimeter is approximately 36.3783 units which rounds to <u>36.4</u>

The answer has been confirmed with GeoGebra.

4 0

2 years ago

A runner runs at an average speed of 7m/s for 25 seconds how fun did the runner run in metres?

jeyben [28]

175

Explanation:

If a runner is running 7 meters per second for 25 seconds then just multiply 7 and 25

7•25= 175

4 0

2 years ago

Read 2 more answers

Guys here somewhere points 100 to be exact can you go

Alenkasestr [34]

Answer:

thanks dude

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Create two different 5 number summaries for the data below

katen-ka-za [31]

The two different 5 number summaries for the data is shown in the table both data size is 20.

<h3>What is the box and whisker plot?</h3>

A box and whisker plot is a method of abstracting a set of data that is approximated using an interval scale. It's also known as a box plot. These are primarily used to interpret data.

It is given that:

Two data set:

Data set A:

72, 56, 81, 84, 75, 26, 39, 62, 65, 66, 85, 71, 74, 68, 73, 66, 83, 60, 58, 72

Population size: 20

Median: 69.5

Minimum: 26

Maximum: 85

First quartile: 60.5

Third quartile: 74.75

Data set B:

44, 45, 51, 51, 53, 53, 55, 57, 58, 62, 65, 66, 69, 69, 70, 73, 75, 77, 78, 79

Population size: 20

Median: 63.5

Minimum: 44

Maximum: 79

First quartile: 53

Third quartile: 72.25

Thus, the two different 5 number summaries for the data is shown in the table both data size is 20.

Learn more about the box and whisker plot here:

brainly.com/question/3209282

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5 0

2 years ago

Examine the two-step equation.

Alona [7]

Answer:

subtraction property of equality, sorry if im wrong i tried :(

Step-by-step explanation:

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3 years ago