The answer depends on what the question is.
Chat with our AI personalities
3/8 2/5
3/8 bags per friend.3/8 bags per friend.3/8 bags per friend.3/8 bags per friend.
Algebra is used in real life in a couple of ways. The most obvious way would be if the career you choose requires use of algebra; engineers, mathematicians, teachers, and scientists are examples of people that might need to use algebra. Otherwise, everyone does use algebra even though they may not realize it. For example, you're at the grocery store picking out ingredients for a big recipe. You need 2 pounds of peanuts, but the store only sells quarter pound bags. Well, in a case like that you're going to have to quickly figure out how many bags will equal the 2 pounds you need. It is just like solving an equation!
Assuming the heavier bags are all of identical weight, this can be done in three weighings, eliminating half of the bags each time. Thus the first weighing compares the bags in two sets of four, and reduces the field to four possible bags. The second weighing compares these in two sets of two, to identify two possible bags. The third and final weighing compares these two remaining bags, determining which is in fact underweight. It can be done in 2 weighings The first weighing compares 3 and 3. If the 3 and 3 are equal, you weigh the two originally left out and will get your answer. If the 3 and 3 are not equal you take the set of 3 that are lighter and weigh 1 and 1, leaving one out. If this weighing is unequal you'll know which bag is lighter. If the weighing is equal then the one you left out is the lightest.
You would need to buy 4 bags.