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3 years ago

Select the angle pairs that will make these triangles similar by AA~ (Please explain) I will mark brianliest!!!

Mathematics

1 answer:

Anuta_ua [19.1K]3 years ago

5 0

Answer:

Angle T is congruent to Angle T

Step-by-step explanation:

If you look at T, you will see a pair of vertical angles, and vertical angles are always congruent. It's similar by AA (angle angle)

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2. If a polyhedron has 19 vertices and 13 faces, how many edges does it have?

Margaret [11]

Answer:

30 Edges.

Step-by-step explanation:

Euler's formula tells us that $V-E+F=2$ (Vertices - edges + faces = 2).

Plug the numbers in:

$19-E+13=2$

Solve:

$32-E=2$

$32=2+E$

$30=E$

Therefore, there are 30 edges.

6 0

3 years ago

How many of the following statements are true?

pychu [463]

Answer:

The second one, third one, and fourth one

Step-by-step explanation:

i cant really explain it but i know that those are the ones.

8 0

3 years ago

(x-4) (x+7)<br>distribution method

Archy [21]

the answer would bex squared + 3x - 28

6 0

3 years ago

Read 2 more answers

Please solve this with explanations!

lyudmila [28]

Answer:

D. -2x - 8

Step-by-step explanation:

1) Simplify 1/3(6x+15) to 6x+15/3

-6x+15/3 - 3

2) Factor out the common term 3.

-3(2x+5)/3 - 3

3) Cancel 3.

-(2x+5)-3

4) Remove parentheses.

-2x-5-3

5) Collect like terms.

-2x+(-5-3)

6) Simplify

-2x-8

3 0

2 years ago

Sound City sells the ClearTone-400 satellite car radio. For this radio, historical sales records over the last 100 weeks show 4

Ksivusya [100]

Answer:

See below

Step-by-step explanation:

$\bf \mu(x)$ is the average

$\bf \mu(x)=\frac{4*0+33*1+39*2+12*3+8*4+4*5}{100}=\frac{199}{100}=1.99\;radios/week$

$\bf \sigma^2(x)$ is the variance

$\bf \sigma^2(x)=\frac{4*(0-1.99)^2+33*(1-1.99)^2+39*(2-1.99)^2+12*(3-1.99)^2+8*(4-1.99)^2+4*(5-1.99)^2}{100}=\frac{128.99}{100}=1.2899$

$\bf \sigma(x)$ is the standard deviation

$\bf \sigma(x)=\sqrt{variance}$

$\bf \sigma(x)=\sqrt{1.2899}=1.1357\;radios/week$

7 0

4 years ago