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3 years ago

What property does (3 + 19) – 12 = 3 + ( 19 – 12) represent?

Mathematics

1 answer:

denpristay [2]3 years ago

6 0

Answer:

associative property

Step-by-step explanation:

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Find the perimeter of the triangle with vertices A(negative 2,2,3), B(4,negative 4,3), and C(7,6,4).

gayaneshka [121]

Answer:

$P\approx 28.872\,\text{units}$

Step-by-step explanation:

We are given coordinates of each of the vertices of the triangle ABC, hence we can use the distance formula to find the lengths of each of the side.

the distance formula is generally written as:

$r = \sqrt{(x_1-x_2)^2+(y_1-y_2)^2+(z_1-z_2)^2}$

for the side AB: A(-2,2,3) and B(4,-4,3)

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

$AB = \sqrt{(-6)^2+(6)^2+(3-3)^2}$

$AB = \sqrt{72}$

for the side BC: B(4,-4,3) and C(7,6,4)

$BC = \sqrt{(4-7)^2+((-4)-6)^2+(3-4)^2}$

$BC = \sqrt{110}$

for the side CA: C(7,6,4) and A(-2,2,3)

$CA = \sqrt{(7-(-2))^2+(6-2)^2+(4-3)^2}$

$CA = \sqrt{98}$

Now we all the sidelengths:

to find the perimeter we need to just sum the three side lengths:

$P = AB + BC + CA$

$P = \sqrt{72} + \sqrt{110} + \sqrt{98}$

$P\approx 28.872\,\text{units}$

this is the perimeter of triangle ABC

6 0

3 years ago

How are the triangles similar pleaseee help I’ll give you BRAINLIEST

Bad White [126]

Answer:

SSS

Step-by-step explanation:

Only sides are given, not angles, so you know it's side-side-side

7 0

3 years ago

What is the measure of <1<br> 1. 80<br> 2. 40<br> 3. 160

Ratling [72]

No she pero necesito puntos :3

3 0

3 years ago

0.07 is 1\10 of what pls explain

balu736 [363]

0.7 is the answer, I will not explain or you as you should figure that out.

8 0

3 years ago

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A chef bought 43.4 pounds of white rice and 6.11 pounds of brown rice. How much rice did the chef buy in all?

lana66690 [7]

Answer:

49.51 pounds

Step-by-step explanation:

43.4+6.11

43.40

06.11

49.51

5 0

3 years ago

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