119/30 or 3.96 or 3 29/30
Explanation:
First write all numerators above the least common denominator (in this case 30)
Then calculate the sum or difference
The answer is: 4.5 cups.
The explanation is shown below:
1. You need 3 cups of milk to make 30 biscuits.
2. Therefore, to solve the exercise you only need to multiply 45 biscuits by 3 cups and divide this by 30 biscuits.
3. Let's call the cups you will need to make 45 biscuits
. Then, you have:

4. Therefore, you will need 4.5 cups to make 45 biscuits.
Answer:
9 + (-6)
Step-by-step explanation:
9-6=3
9 + (-6)= 3
Hope it will help you