15 ounces of butter
20 ounces of sugar
25 ounces of flour
10 eggs
5 tsp baking powder
You seem to be missing a symbol, which I assume is intersection

.
From the definition of conditional probability,
The answer is D) 5/24 because the fractions have unlike denominators
For number 3 the answer would be 6. That would be the answer for n.
For number 4 the answer would be -6. That would be the answer for n.
Answer
Let f(x) = ax + b
Then
f(x + 1) = a(x + 1) + b
= ax + a + b
Hence, a = 3, and a + b = 5, b = 2
f(-2) = 3(-2) + 2
= -6 + 2
= - 4
f(2x) = 3(2x ) + 2
= 6x + 2