Answer:
Step-by-step explanation:
What you have are sets A and B and then the Union of those 2 sets. The Union of sets is like the "marriage" of them. The 2 sets come together and bring along with them ALL of their junk and they have to share it.
The upside down U indicates the intersection of the sets. In other words, what they both have in common. They both share a 5 and a 7. Therefore, A∩B = {5, 7}
It takes 250 g of pasta and 240 ml of sauce to make one batch of spaghetti and it takes 600g of pasta and 700ml of sauce to make one batch of lasagna.
Case 1: Pasta
The chef wants to make spaghetti and lasagna using more than 4000 g of pasta.
S denote the number of batches of spaghetti he makes and L the number of batches of lasagna he makes.
So the equation becomes :

Case 2: Sauce
chef wants to make spaghetti and lasagna using more than 5000 ml of sauce.
S denote the number of batches of spaghetti he makes and L the number of batches of lasagna he makes.
So the equation becomes:
Answer :
The two equations are :
For pasta: 
For sauce:
Every 56 seconds, the radioactive substance is divided in half.
224 / 56 = 4
We need to cut the substance in half 4 times.
896 / 2 = 448
448 / 2 = 224
224 / 2 = 112
112 / 2 = 56
After 224 seconds, there will be 56 grams of the radioactive substance left over
Answer
Yes
both divide by 7
2/3
Step-by-step explanation:
Another example if it was 15/10
Then yes
Both divide by 5
so
3/2