let h= history books
science books = s
h=2s there are 2 times as many history as science so to get them equal we double the science
h+s=81 there are 81 total history and science books
2s+s=81 substitute 2s for h in the above equation
3s = 81 combine like terms
s = 27
There are 27 science books
h=2s
h=2(27)
h=54
there are 54 history books
Answer:
The value of f(5) is 3.2.
Step-by-step explanation:
It is given that f(1) = 3.2 and

Substitute x=1 in the above equation.


Substitute x=2 in the given equation.


Substitute x=3 in the given equation.


Substitute x=4 in the given equation.


Therefore the value of f(5) is 3.2.
Answer:
sjshdsedhbehbeh i dont know
Step-by-step explanation:
Answer:
Yes
Step-by-step explanation:
For lines to be parallel alternate interior angles should be equal
Angle GHD=180-angle FHD
=180-115 = 65°
Therefore angle AGH = angle GHD
So lines are parallel
length : 
Explanation:
use the distance formula : 



