Answer:
1/3
Step-by-step explanation:
We need to know the other marbles in the bag and how many there are of each.
The sum of two numbers is 13 more than twice the first number:
x + y = 2x +13
x - y = y - 14
solve the system of equations:
x - (x + 13) = (x +13) - 14
x = -12
y = 1
Answers:
f(1) = -1
f(0) = 1
f(2) = 1
f(-2) = 17
