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alexdok [17]
3 years ago
11

Which of the following statements about using a protractor are correct?

Mathematics
2 answers:
Leviafan [203]3 years ago
8 0

Answer:

(B) (C) and (D)

Step-by-step explanation:

An instrument for measuring angles, typically in the form of a flat semicircle marked with degrees along the curved edge is known as Protractor.

The protractor measures angles up to 180°, thus option A is incorrect that is the protractor measures angles more than 90°.

In order to construct any angle using the protractor, the vertex of the angle must be at 0° mark, thus option B is correct.

Option C is correct because a ray is a line that has one defined endpoint is called a ray and extends endlessly in one direction and that point must point at 0°.

Also, The protractor measures angles that open from left or from the right, thus option D is correct.

DedPeter [7]3 years ago
3 0
The protractor measures angles that open from left or from the right

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Tems11 [23]

Answer:

3(x + 2)(2x - 5)

Step-by-step explanation:

Given

6x² - 3x - 30 ← factor out 3 from each term

= 3(2x² - x - 10) ← factor the quadratic

Consider the factors of the product of the coefficient of the x² term and the constant term which sum to give the coefficient of the x- term

product = 2 × - 10 = - 20 and sum = - 1

The factors are + 4 and - 5

Use these factors to split the x- term

2x² + 4x - 5x - 10 ( factor the first/second and third/fourth terms )

= 2x(x + 2) - 5(x + 2) ← factor out (x + 2) from each term

= (x + 2)(2x - 5), thus

2x² - x - 10 = (x + 2)(2x - 5) and

6x² - 3x - 30

= 3(x + 2)(2x - 5) ← in factored form

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3 years ago
A bicycle tire has a radius of 10 inches. To the nearest inch, how far does the tire travel when it makes 4 revolutions?
Aloiza [94]

Answer: 251.2 inches.

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2 years ago
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For the sequence 3, 8, 13, 18, 23, ….: (i) Find recursive and non-recursive formulas. (ii) Prove the non-recursive formula using
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Answer:

Step-by-step explanation:

Given is the sequence 3, 8, 13, 18, 23, ….:

We find that this is a geometric sequence with each term added with 5 to the previous term

Hence recursive formula is a_n =a_{n-1} +5

Non recursive formula:

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iii) Start with 3.

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Repeat this m times.

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3 years ago
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