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2 years ago

I'll mark u brainliest for the right answer and 15 POINTS!!!

Mathematics

1 answer:

morpeh [17]2 years ago

8 0

The sum of all angles in a regular octagon is 1080 degrees. Because all sides are the same (regular octagon), all of the eight angles are the same too, so we simply divide 1080 by 8 and that is the solution.

1080/8 = 135

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Which of the following numbers is a Mersenne prime?<br> A: 90<br> B: 27 - 1<br> C: 211 - 1<br> D: 15

My name is Ann [436]

Answer:

B: 2⁷-1 = 127

Step-by-step explanation:

A Mersenne prime is a prime of the form 2^n -1, where n is also a prime.

Among the answer choices, neither 90=2·3²·5 nor 15=3·5 is prime. Both 2⁷-1 = 127 and 2¹¹-1 = 2047 are of the right form, but 2047 = 23·89 is a composite number.

2⁷-1 = 127 is a Mersenne prime

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2 years ago

One T-shirt is sold for every 5 people who attend a concert.

docker41 [41]

5:1 people to T Shirt

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3 years ago

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This is a really hard question

Anastasy [175]

Answer:

D. 4x - 6

Step-by-step explanation:

f(x) = 4x - 2
f(x - 1) = 4(x - 1) - 2 = 4x - 4 - 2 = 4x - 6

Correct option is D

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2 years ago

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A copy machine can print 480 copies every 4 minutes. A teacher printed 720 copies. How long did it take to print?

Dafna1 [17]

Answer:

6 minutes

Step-by-step explanation:

every minute is 120

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2 years ago

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What is the rate of change of y=-4/9x+5

WARRIOR [948]

Answer:

Rate of change of y is $- \frac{4}{9}$

Step-by-step explanation:

$y = - \frac{4}{9} x + 5 \\ \\ differentiating \: with \: respect \: to \: x \\ \\ \frac{dy}{dx} = - \frac{4}{9} \frac{d}{dx} x + \frac{d}{dx} 5 \\ \\ \frac{dy}{dx} = - \frac{4}{9} .1 + 0 \\ \\ \huge \red{\frac{dy}{dx} = - \frac{4}{9} } \\ \\ rate \: of \: change \: of \: y =- \frac{4}{9}$

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2 years ago