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.
=40
Multiply both sides by 12...
x = 480
Hence, The total number of pages in the 12 chapters is 480.
Answer: 
Step-by-step explanation:
Given: The total number of ways of to choose 3 contestants out of 7 (including me and my friend)=35..................> Total outcomes.
Favorable outcomes = 2
Then the probability that me and my friend are both chosen =
Thus , the probability that me and my friend are both chosen =
Answer:

Step-by-step explanation:
The right triangle has the hypotenuse = 18
Let 'Ф' be the missing angle
we know that
cos Ф = adjacent/hypotenuse
Here,
so
cos Ф = adjacent/hypotenuse



Therefore, the missing angle is:

<u>Answer:</u>
h= 1/4; g = 4
<u>Step-by-step explanation:</u>
1. 3/5h - 1/10 = h/5
First multiply by 10 to get rid of the fractions
(10)3/5h - (10)1/10 = (10)h/5
6h - 1 = 2h
Add one to each side
6h = 2h + 1
Subtract 2h from each side
6h - 2h = 1
4h = 1
Divide 4 by each side
h = 1/4
2. 3g - 10/4 = 1/2
Multiply each side by 4 to get rid of fractions
(4)3g - 10/4 = (4)1/2
3g - 10 = 2
Add 10 to each side
3g = 12
Divide each side by 3
g = 4
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