The answer is A) 1:2, because there are 80 blue marbles and 40 red marbles, (for a total of 120 marbles) and the ratio 40:80 simplifies down to 1:2.
Answer:
Answer is A
Step-by-step explanation:
100× x is 100x
100 × 10 is 1000
4.5
3
5
х
Find the length of x= 3
Answer:
<em>Proof in explanation</em>
Step-by-step explanation:
<u>Trigonometric Identities</u>
The basic trigonometric identity is:
We'll use it and some basic algebra to prove that, given:
And
Then
From the equation:
We have:
The equation
Can be rewritten as
Replacing [1]:
Taking the common factor:
The expression in parentheses is 1, thus:
Dividing by
Replacing in
We have
Dividing by
Now:
This expression is 1, thus it's proven: