Well the relationship between them is a^2+b^2=c^2 (Pythagoras)
So you could put that in words and say that the sum of each leg of a right triangle squared is equal to the hypotenuse squared.
Two rational numbers between 0.3 and 0.4:
One would be 7/20, which equals 0.35 (35/100).
Another one may be 0.38.
Basically, these answer should be right because it is between 0.3 and 0.4.
Call g the number of girls and b the number of boys.
These are the equations that represent the situation:
1) g = 4 + 2b
2) g/2 - b = 2
To solve it you can multiply the second by 2:
=> 2 { g/2 - b = 2 }
=> g - 2b = 4
As you can see this equation is equivalent to the first equation, so this system is not determined (it has infinite solutions).
Answer:
-5.6
Step-by-step explanation:
g(x)=2x-1
g(-2.3)=2(-2.3)-1=-4.6-1=-5.6