Answer:
I think it is D
Step-by-step explanation:
Composition means that you can plug g(x) into f (x). This is written as "( f o g)(x)", which is pronounced as "f-compose-g of x". And "( f o g)(x)" means " f (g(x))". That is, you plug something in for x, then you plug that value into g, simplify, and then plug the result into f. hope this helps.
10/40 or 1/4 is the rest of the amount needed to fill the tank up hope I helped.
Answer:
and 
Step-by-step explanation:
To solve this, you must set up a system of equations. The first sentence says that there are two numbers and that their sum is 91, so your first equation is 
. For the next equation, it says that the difference of those same numbers is 1, which means that the equation is 
. Now, putting those two together for the system of equations, it's easiest to add them. The result will be 
which when simplified gives you the value of x. Taking the value of x, you can substitute in the second equation to find the value of y.
Hope this helped!
n - 10 = 27
let the number be 10 then half this number is n and 10 less is
n - 10
this is 27 meaning equal to 27 thus equation is
n - 10 = 27
