I need help please

Question

Write a situation that could be represented by the expression.

3a+6, where a=age in years

Answer 1

As a disclaimer, I want you to know the example I'm giving is for a DIFFERENT algebraic expression, because otherwise I'd just be giving you the straight up answer.

So, let's say the expression is something like: 2x - 5, where x = cookies, because I haven't had dinner yet and now I'm craving cookies.

A bit of imagination is required here. For my cookie example, I would imagine myself in a situation with a crap ton of cookies, like 100 of them. That was just some random number I chose, and I'm going to use that in place of x, just for now. So now the expression is 2(100) - 5, right? That's just to get the brainwaves flowing. Now I can start coming up with an example.

There's 100 cookies. Somehow, that number is multiplied by 2. Maybe a recipe calls for doubling the quantity or something. Then that number is subtracted by 5. Let's say my roommate got the munchies and came along and ate 5 of the cookies. BOOM! There's our example. Now we just have to replace 100 back with ''x" and put the whole thing in "formal terms" so our teacher will be happy.

A recipe calls for doubling a number of cookies (x). Once the cookies have been baked, someone comes along and eats five of them.

Now, can you do the same thing with your 3a+6, where a = age in years? I'd recommend starting with siblings of different ages. Good luck, and let me know if you still need help! :)

Answer 2

One possibility is as follows:

Let a be Jack's age.

If Jill's age is three times Jack's age plus an additional six years, how old is Jill?