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ella [17]
4 years ago
5

Which of the following statements says that a number is between -5 and 5?

Mathematics
2 answers:
almond37 [142]4 years ago
6 0
Id say |x|=5, that's my guess
Katen [24]4 years ago
6 0

Answer:

B. |x|

Step-by-step explanation:

Let x be required number.

We are asked to choose the option that says that a number is between -5 and 5.

First of all, we will represent solution of each of our given option.

A. |x|>5

Using absolute value definition if |u|>a, then for ua, we can write our given inequality as x5. Therefore, option A is not a correct choice.

B. |x|

Using absolute value definition if |u|, then for -a, we can write our given inequality as -5. Therefore, option B is the correct choice.

C. |x|=5

Using absolute value definition if |u|=a, then for u=-a\text{ and }u=a], we can write our given absolute value as x=-5\text{ and }x=5. Therefore, option C is not a correct choice.

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Given that sin theta = 1/4, 0
GaryK [48]
Answer: cos(Θ) = (√15) / 4

Explanation:

The question states:

1) sin(Θ) = 1/4

2) 0 < Θ < π / 2

3) find cos(Θ)

This is how you solve it.

1) Use the fundamental identity (in this part I use α instead of Θ, just for facility of wirting the symbols, but they mean the same for the case).

(cos \alpha )^2 + (sin \alpha )^2 =1

2) From which you can find:

(cos \alpha )^2 = 1 - (sin \alpha )^2

3) Replace sin(α) with 1/4

=> (cos \alpha )^2 = 1 - (1/4)^2 = 1 - 1/16 = 15/16

=> cos \alpha =+/- \sqrt{15/16} = +/- (\sqrt{15} )/4

4) Given that the angle is in the first quadrant, you know that cosine is positive and the final answer is:

cos(Θ) = \sqrt{15} /4.

And that is the answer.
6 0
3 years ago
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Step-by-step explanation:

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7 0
3 years ago
How would you estimate 412÷97?
marissa [1.9K]
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How many arrangements of three letter can be formed from the letters of the word MATH if anyletter will not be used more than on
Mariulka [41]

Combinations = n! / (n - r)! r!

C\text{ = }\frac{n!}{(n-r)!\text{ r!}}\text{ }

In this case:

n = 4

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4 arrangements

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A, C, E, F

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