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3 years ago

Is the following number rational or irrational?

Mathematics

2 answers:

Elza [17]3 years ago

8 0

Rational
Hope this helps

SCORPION-xisa [38]3 years ago

4 0

Answer:

A) Rational

Step-by-step explanation:

Rational numbers are numbers that are able to be expressed in fraction form. 121 can be expressed as 121/1 or 242/2 and so on.

An irrational number example would be pi=3.14159265354..... this number cannot be expressed as a ratio or fraction, therefore it is an irrational number.

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What is the simplest form of the expression below?

sineoko [7]

Answer:

(B) cot Theta

Step-by-step explanation:

We want to simplify the expression:

$\dfrac{cot\theta cos\theta}{sin\theta } X\dfrac{tan\theta}{\frac{sin\theta}{cos\theta tan \theta} }$

Now:

$\dfrac{ cos\theta}{sin\theta } =cot\theta\\\dfrac{ sin\theta}{cos\theta }=tan \theta\\$Substituting these into the expression\\\dfrac{cot\theta cos\theta}{sin\theta } X\dfrac{tan\theta}{\frac{sin\theta}{cos\theta tan \theta} }=cot\theta cot\theta X\dfrac{tan\theta}{\frac{tan\theta}{ tan \theta} }\\=cot\theta cot\theta X tan\theta$ (Since cot\theta X tan\theta =1) \\$Therefore our result:\\=cot\theta$

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3 years ago

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Work out the size of angle x.<br>X<br>140°<br>105°

yKpoI14uk [10]

Answer:

- 65

Step-by-step explanation:

x + 140 + 105 = 180

x + 245 = 180

x = 180- 245 = - 65

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3 years ago

The product of two numbers is 30. If one of the numbers is 15/, what is the other number?

PSYCHO15rus [73]

Answer:

The other number is 2 if the given number is 15.

Step-by-step explanation:

One of the numbers is 15, correct?

Let the other number be x.

15 × x = 30

x = 30/15

x = 2.

Let's check:

15 × 2 = 30.

30 = 30.

Correct!

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3 years ago

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kow [346]

Answer:

Step-by-step explanation:

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2 years ago

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