The answer is N-7......................................
Three.
They've got the same denominator, so you can act like the nominators are whole numbers and simply divide those. Or...
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Cross multiply, so 1 times 4 and 4 times 3.
And then divide to get 3.
2+3=5
5x=y
25 is the only number between 20 and 30 divisible by 5
5x=25
x=5
5*2= 10
There are 10 boys
5*3= 15
There are 15 girls
There are 25 total members
Approximately 84 people will be sick with the flu after 11 days. The equation is f(x)=36(1.08)^x and you would substitute the amount of days in for x. The formula I used is f(x)=ab^x where a is the initial value and b is the multiplicative rate of change.
Let's say you had the ratio 14:21
The GCF of the two values (14 and 21) is 7
14 = 7*2
21 = 7*3
We can divide both parts of the ratio by the GCF 7 to get
14/7 = 2
21/7 = 3
Meaning the original ratio 14:21 fully reduces to 2:3
So in short, we use the GCF to help fully reduce any ratio.
This also applies to fractions as well. We could have something like 9/33 fully reduce to 3/11 after dividing both parts (9 and 33) by the GCF 3.