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3 years ago

Which number is itra

Mathematics

2 answers:

True [87]3 years ago

8 0

Answer:

Step-by-step explanation:

Its irrational

notka56 [123]3 years ago

4 0

Answer:

Step-by-step explanation:

a = 8/5 ∈ Q

c = 12 ∈ N

d = 1/2 ∈ Q

b ∈ I

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Simplify 4 + 10 ÷ (–2).

Gnesinka [82]

Answer:

-1 Your answer is A

Step-by-step explanation:

4+ 10/-2=-1

10/-2=-5

4+-5=-1

3 0

3 years ago

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Let u = (1, 2 -2), v= (2, 1, 3) and w = j + 4k. a) Find cos theta, where theta is the angle in degrees between u and w.

vodka [1.7K]

Answer: The value of cos theta is -0.352.

Step-by-step explanation:

Since we have given that

$\vec{u}=1\hat{i}+2\hat{j}-2\hat{k}\and\\\\\vec{w}=\hat{j}+4\hat{k}$

We need to find the cos theta between u and w.

As we know the formula for angle between two vectors.

$\cos\ \theta=\dfrac{\vec{u}.\vec{w}}{\mid u\mid \mid w\mid}$

So, it becomes,

$\cos \theta=\dfrac{2-8}{\sqrt{1^2+2^2+(-2)^2}\sqrt{1^2+4^2}}\\\\\cos \theta=\dfrac{-6}{\sqrt{17}\sqrt{17}}=\dfrac{-6}{17}=-0.352\\\\\theta=\cos^{-1}(\dfrac{-6}{17})=110.66^\circ$

Hence, the value of cos theta is -0.352.

8 0

3 years ago

Inqualtites question<br><br>Complete the inequality expression that describes this set of numbers:

RideAnS [48]

Answer:

- 3 ≤ x < 0

Step-by-step explanation:

- 3 is included in the set thus x can equal - 3

- 3 is less than all other values in the set including the largest value of 0, thus

- 3 ≤ x < 0

3 0

3 years ago

NEED HELP WITH A MATH QUESTION

Lady_Fox [76]

Answer:

$\dfrac{18}{5}$

Step-by-step explanation:

The picture shows three isosceles tirangles with the same legs. The base of each triangle is 12 units, 5x-3 units and 17 units.

Since the angles at vertex of each isosceles triangles are 27°, 28° and 29°, then the lengths of the bases satisfy the double inequality

15<5x-3<17

Add 3 to this inequality

15+3<5x-3+3<17+3

18<5x<20

Divide it by 5:

$\dfrac{18}{5}$

3 0

3 years ago

Which of the following must be true?

Naddika [18.5K]

Answer:

B, it's the only plausible one. A is wrong because the value would be above 180°

5 0

3 years ago

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