F(x)=2x-1
g(x)=2x+4
Find (f+g)(x)

(f+g)(x)=4x+3

Step-by-step explanation:

Given the functions f and g defined above, their sum f+g is defined by (f+g)(x)=f(x)+g(x). Using algebra, we thus have (f+g)(x)=2x-1+2x+4=4x+3.

If you have a large bowl of salad (which is a whole 1) and your brother eats 1/3 of it before your friends come over, then you have:

1 - 1/3 = 2/3 of salad left

We don't know how many friends will come, so let's assume it's x of them who will visit you. In such case we have to divide 2/3 by x friends:

2/3 ÷ x =
= 2/3 * 1/x =
= 2/3x

Each friend will get 2/3x of the salad.