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snow_lady [41]
2 years ago
10

The total surface area of a cone whose radius is 2 r and slant height 2l is

Mathematics
1 answer:
vampirchik [111]2 years ago
7 0

Answer:

A=4\pi r(l+r)

Step-by-step explanation:

The total surface area of a cone is given by :

A=\pi rl+\pi r^2\\\\=\pi r(l+r)

Put r = 2r and l = 2l in the above formula

A=\pi \times 2r(2l+2r)\\\\A=2\pi r(2l+2r)\\\\=2\pi r \times 2(l+r)\\\\=4\pi r(l+r)

Hence, the total surface area of the cone is 4\pi r(l+r).

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What’s the answer of the equation:<br><br> 104mn + (-84mn) =36
inn [45]

Answer:

1\frac{4}{5}mn

Step-by-step explanation:

104mn - 84mn = 36 \\  \\ 20mn = 36 \\  \\ 1\frac{4}{5}mn

This what you can do unless you are solving for either variable.

I am joyous to assist you anytime.

8 0
2 years ago
Which formula can be used to find the nth term of a geometric sequence where the first term is 8 and the common ratio is -3
kirill [66]
Hello : 
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</span>an= 8×(-3)^(n-1)<span>


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8 0
3 years ago
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Does anyone know this? I’m really stuck
S_A_V [24]

<em>p = 21</em>

Step-by-step explanation:

When you have a midsegment, the base is going to be two times as large as the midsegment. You can find the midsegment if you multiply it by two and set it equal to the base. I have attached a photo below that may help you.

This is the equation we will be using.

2(p-13)=p-5

Now let's solve! Let's start by distributing the 2 by what's in the parentheses.

2p-26=p-5

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Add 26 to both sides.

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7 0
2 years ago
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Help!
andre [41]

Answer:

∠X in the pre-image will be equal to ∠L in the main image

Step-by-step explanation:

△LMN is the result of a reflection of ​ △XYZ which means △LMN is the mirror image​ △XYZ

hence, the left of △XYZ will be equivalent to the right of △LMN and the right of △XYZ will be equivalent to the left of △LMN

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6 0
3 years ago
8/12 - 1/3 =<br> Please answer my question
Ber [7]

Answer:

1/3

Step-by-step explanation:

8/12 - 4 /12=.  4/12 = 1/3. =. .33

8 0
3 years ago
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