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Nana76 [90]
3 years ago
13

Is the square root of -11.2 a rational number?

Mathematics
1 answer:
Schach [20]3 years ago
5 0
No, it is an imaginary number.
Can't take the square root of a negative number without creating a method termed an imaginary number, which is the square root of -1 which they have used " i " to signify.
Then square root of -11.2 would be written Sqrt(11.2)i.  The Sqrt(11.2) = 3.3466
so the answer is 3.3466i

 
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Answer:

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Determine which of the following expressions can be factored to (x+ 2)(x +2)
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Directions: Calculate the percent increase or decrease between the starting and ending
Sveta_85 [38]

I'll do the first two to get you started

===============================================

Problem 1

A = 3 = starting value

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C = [ (B - A)/A ] * 100%

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The positive C value means we have a percent increase. If C was negative, then we'd have a percent decrease.

<h3>Answer: 233.3% increase</h3>

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Problem 2

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7 0
3 years ago
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tia_tia [17]

Answer:

m∠BCE = 28° and m∠ECD = 134°

Step-by-step explanation:

* Lets explain how to solve the problem

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- That means when we multiply measure of angle BCE by five and

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∴ m∠ECD = 5 m∠BCE - 6 ⇒ (1)

∵ m∠BCD = m∠BCE + m∠ECD

∵ m∠BCD = 162°

∴ m∠BCE + m∠ECD = 162 ⇒ (2)

- Substitute equation (1) in equation (2) to replace angle ECD by

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∴ m∠BCE + (5 m∠BCE - 6) = 162

- Add the like terms

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the formulae to find the perimeter of a rectangle is p = 2(l+w)

<em>where</em>

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answer: = 2(11+4)

= 2 × 15

= 30 m

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