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kvv77 [185]
3 years ago
7

The Pyraminx is a Rubik's cube-type toy in the shape of a tetrahedron. The Pyraminx shown below has edges 15\,\text{cm}15cm long

and vertical height h=12.2\,\text{cm}h=12.2cm. The triangle drawn with dashed lines is a right triangle. What is the distance rr? Round your answer to the nearest tenth.
Mathematics
1 answer:
Alex787 [66]3 years ago
3 0

Answer:

8.7

Step-by-step explanation:

15 squared is 225 then you subtract the square of 12.2: 148.84, then after you find that out, you find the square root of 76.16 since that's what the answer of 15 squared minus 12.2 squared, and the answer is 8.7

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382.993 to the nearest hundredth​
tia_tia [17]

Answer:

That number rounds to the nearest hundredth to this number: 382.99

8 0
3 years ago
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Divide.<br><br> −445÷4<br><br><br> ​−115​<br><br> ​​−45<br><br> 45<br><br> ​​115
Anestetic [448]

Answer:

-1 1/5

Step-by-step explanation:

<em>Change the whole number 4 to an improper fraction</em>

-4 4/5 ÷ 4/1 = -4 4/5 ÷ 4/1

<em>Reciprocal the 4/1 will become 1/4 then go to multiplication</em>

-4 4/5 ÷ 4/1 = -4 4/5 × 1/4

<em>Change to improper fraction the -4 4/5</em>

-4 4/5 ÷ 4/1 = -24/5 × 1/4

<em>Then simply multiply the two numerators and the two denominators</em>

-4 4/5 ÷ 4/1 = -24/20

<em>Finally, Simplify it to get the answer</em>

-4 4/5 ÷ 4/1 = -1 1/5

4 0
3 years ago
Evaluate the following expression: 2(1,1) -4(0,1). enter your answer as a vector.
wolverine [178]

Answer:

The answer is (2,-2)

You just distribute the 2 into (1,1) and same with the -4 into (0,1) and add them together ‍

Step-by-step explanation:

7 0
3 years ago
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Factorise (x+6)²-36x². ​
Lady bird [3.3K]

Answer:

[(x+6)-6x] [(x+6)+6x]

(x+6-6x)(x+6+6x)

(6-5x)(7x+6)

5 0
3 years ago
A funnel has a diameter of 9 in. and is 16 in. tall a plug is put at the open end of the funnel what it the volume of the cone
SCORPION-xisa [38]
The volume of the cone by definition is given by:
 V = (pi * r ^ 2 * h) / 3
 Where,
 h: height
 r: radio
 Substituting the values we have:
 V = (pi * (9/2) ^ 2 * (16)) / 3
 V = 339.2920066 in ^ 3
 Rounding:
 V = 339.3 in ^ 3
 Answer:
 
the volume of the cone is:
 
V = 339.3 in ^ 3
5 0
3 years ago
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