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3 years ago

WILL MARK BRAINLIEST! PLEASE HELP!!

Mathematics

2 answers:

Ber [7]3 years ago

4 0

An octagon has 8 sides. Each side is given as 2a + 1

Perimeter = 8(2a + 1)

= 16a + 8

Answer: 16a + 8

nlexa [21]3 years ago

4 0

as we all know ... an octagon has 8 corners / sides

and they told that each side is equal to 2a + 1

so we need to make an equation which will be 8 (2a+1)

ans now we need to multiply 8 with both 2a and 1

so, 8 ( 2a + 1 )

16a + 8

we cant do this further as its not "like"

so the answer is 16a + 8

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A book has 12 chapters. The mean length of the chapters is 40 pages. How many total pages are there in the 12 chapters?

amm1812

Answer:

480

Step-by-step explanation:

Important Information:

A Book Has 12 Chapters.

The Mean length of the chapters is 40 pages.

Question to Answer:

How many total pages are there in the 12 chapters?

Explanation/Solution:

Let's assume that the total number of pages in the book is "x" pages.

To find the mean (average) we divide the total "x" by 12 because there are 12 chapters in the book, which would equal to 40.

$\frac{x}{12}$ =40

Multiply both sides by 12...

x = 480

Hence, The total number of pages in the 12 chapters is 480.

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2 years ago