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tekilochka [14]
3 years ago
6

PLEASE HELP

Mathematics
1 answer:
Romashka [77]3 years ago
4 0

Answer:

copper is conductor because electricity and heat can travel through it

rubber insulator

silver conductor

wood insulator

plastic insulator

Step-by-step explanation:

all metals are conductors btw

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5 (-8n +5) -4n only right ANSWERSSS
olga55 [171]

Answer:

-44n+25

Step-by-step explanation:

5(-8n+5)-4n

-40n+25-4n

-40n-4n+25

-44n+25

3 0
3 years ago
Read 2 more answers
Find the value of x in the triangle shown below.<br> X°<br> 27°<br> 45°
drek231 [11]

Answer:

So the sum of a triangle is 180° so 45°+27°= 72°

180° - 72°= 108°

X = 108°

4 0
3 years ago
Lesson 4.10 - Analytic Geometry
Nadusha1986 [10]

Geometric shapes are mathematical shapes that include squares and triangles

<h3>How to prove the shape is a square</h3>

The side lengths of a square are congruent, and the adjacent sides are perpendicular.

So, we start by calculating the side lengths using the following distance formula

d = \sqrt{(x_1 -x_2)^2 + (y_1 -y_2)^2}

Using the above formula, we have:

AB = \sqrt{(3-2)^2 + (4+2)^2} = \sqrt{37

BC = \sqrt{(2+4)^2 + (-2+1)^2} = \sqrt{37

CD = \sqrt{(-4+3)^2 + (-1-5)^2} = \sqrt{37}

DA = \sqrt{(-3-3)^2 + (5-4)^2} = \sqrt{37}

The above shows that the side lengths of the square are congruent.

Next, calculate the slope of the sides using:

m = \frac{y_2 -y_1}{x_2 -x_1}

So, we have:

m_{AB} = \frac{4 +2}{3 -2} = 6

m_{BC} = \frac{-2 + 1}{2+4} = -\frac 16

m_{CD} = \frac{-1 -5}{-4+3} = 6

m_{DA} = \frac{5 -4}{-3-3} = -\frac 16

Notice that the opposite slopes are congruent, and the adjacent slopes are opposite reciprocal.

The above highlight, and the equal side lengths show that the figure (1) is a square

<h3>How to prove the shape is a right isosceles triangle</h3>

The legs of a right isosceles triangle are congruent, and the legs are perpendicular.

So, we start by calculating the lengths of the legs using the following distance formula

d = \sqrt{(x_1 -x_2)^2 + (y_1 -y_2)^2}

Using the above formula, we have:

XY = \sqrt{(5-4)^2 + (-1-4)^2} = \sqrt{26

XZ = \sqrt{(5-0)^2 + (-1+2)^2} = \sqrt{26

The above shows that the legs of the right isosceles triangle are congruent.

Next, calculate the slope of the legs using:

m = \frac{y_2 -y_1}{x_2 -x_1}

So, we have:

m_{XY} = \frac{5-4}{-1 -4} = -\frac{1}{5}

m_{XZ} = \frac{5-0}{-1+2} = 5

Notice that the slopes are opposite reciprocal.

The above highlight, and the equal legs show that the figure (2) is a right isosceles triangle

Read more about geometric shapes at:

brainly.com/question/14285697

7 0
3 years ago
Four friends participated in a speed-typing contest. Who has the slowest typing speed? Georgie: 320 words in 8 minutes Tara: 403
dsp73
Frank has the lowest typing speed, at only 39.5 words per minute.

Tara has 40.3 wpm
Georgie has 40 wpm
Lupe had 40.5 wpm
4 0
3 years ago
Calculate the speed at the edge of a disc of radius 8.5 cm that rotates at the rate of 2.5 rev/s.
Zina [86]

Answer:

11 m/s

Step-by-step explanation:

cause 8.5 add 2.5 then 11 then m/s

6 0
1 year ago
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