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Neporo4naja [7]
4 years ago
10

Rationalize the denominator of square root of negative 9 over open parentheses 4 minus 7 i close parentheses minus open parenthe

ses 6 minus 6 i close parentheses.
Mathematics
1 answer:
svetlana [45]4 years ago
3 0
First we combine the parenthesis to get 9/(-2-i)  then we multiply both the numerator and the denomenator by the conjugate of -2-i (whic is -2+i) to get (-18+9i)/5
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pickupchik [31]

The lateral Surface area of the cylinder is 162.2 cm².

The lateral Surface area of the triangular prism is 226.6 cm².

<u>Step-by-step explanation:</u>

<u>To find the lateral Surface area of the cylinder :</u>

The given information are,

  • The height of the cylinder, h = 12.3 cm.
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⇒ r = 4.2 ÷ by 2

⇒ r = 2.1 cm

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⇒ 51.66 × 3.14

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<u>To find the lateral Surface area of the prism :</u>

The given information are,

  • The height of the prism, h = 10.3 cm.
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⇒ (8+8+6) × 10.3

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3 years ago
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Step-by-step explanation:

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Vedmedyk [2.9K]

Answer:

x=5, \\x=-1

Step-by-step explanation:

Given (x-2)^2=9, to solve for x, our goal is to isolate x.

Take the square root of both sides:

x-2=\pm\sqrt{9},\\x-2=\pm 3(recall that 3^2=(-3)^2=9).

Therefore, we have two cases:

\begin{cases}x-2=3,x=\boxed{5} \\x-2=-3, x=\boxed{-1}\end{cases}

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3 years ago
What is tan 11(3.14)/6
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It should be -118.2  I just did that on an online calculator/solver. If its not the right answer I can try something different.
6 0
4 years ago
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