Ask your own question, for FREE!
Algebra 18 Online
OpenStudy (anonymous):

Company A rents copiers for a monthly charge of $300 plus 12 cents per copy. Company B rents copiers for a monthly charge of $600 plus 6 cents per copy. What is the number of copies above which Company A's charges are the higher of the two?

OpenStudy (anonymous):

any takers

OpenStudy (anonymous):

can someone help me

OpenStudy (espex):

How far have you gotten on this?

OpenStudy (anonymous):

Not too far

OpenStudy (espex):

Well, show me where you're at and let's see if we can't get an answer.

OpenStudy (anonymous):

I have another question that needs to be answered besides that one

OpenStudy (espex):

We should probably do one at a time.

OpenStudy (anonymous):

Yea but I'm doing online courses that need to be completed before the end of July and now I have a geometry question

OpenStudy (espex):

Let's see how far you've gotten on this one.

OpenStudy (anonymous):

Well I didn't get far at all on it

OpenStudy (espex):

That's okay, show me what you have done.

OpenStudy (anonymous):

The only thing I've done is stare at the question that's why I'm here

OpenStudy (anonymous):

I'm not the best at any kind of math besides counting and multiplication

OpenStudy (espex):

You might just surprise yourself. Okay, so this appears to be an inequality equation so why don't we start by writing what we know. Put what you know about the cost under the labels: Company A Company B

OpenStudy (anonymous):

well company A is 300 dollars and company B is 600 dollars

OpenStudy (espex):

Those are the initial costs, what about the cost per page?

OpenStudy (anonymous):

ah I think 12 and 6

OpenStudy (anonymous):

cents

OpenStudy (espex):

Yes, but we need this in similar units AND we need it in the form of an expression of cost.

OpenStudy (anonymous):

That's where I'm lost

OpenStudy (espex):

So we would want to write something like: Company A Company B $300 + $0.12 $600 + $0.06

OpenStudy (anonymous):

should I take notes

OpenStudy (espex):

Now what does the question want you to find out?

OpenStudy (espex):

You could refer back to this, remember it, or take notes to refer to, it is really up to you.

OpenStudy (anonymous):

That's what I'm doing. Now the problem wants me to find company A's charges compared to B's and see if it is higher

OpenStudy (espex):

True, but more specifically they are saying, if you made an equal amount of copies at both businesses, how many copies would you need to make before company A costs you more money?

OpenStudy (anonymous):

Yea that's right but how

OpenStudy (espex):

If you made 2 copies at both places, how much would you spend at each?

OpenStudy (anonymous):

300 and 600?

OpenStudy (espex):

Did both places give you 2 free copies?

OpenStudy (anonymous):

no

OpenStudy (espex):

Okay, so how much would it cost you?

OpenStudy (anonymous):

Uhh don't you have to multiply or divide

OpenStudy (espex):

Yes, you do have to do one of those. :) Think about what it is telling you, because if you don't understand what information it is giving you then it will make solving this much more difficult. Company A says that they will charge you $300 plus $0.12 for each copy.

OpenStudy (espex):

And right now you want 2 copies.

OpenStudy (anonymous):

Yea

OpenStudy (anonymous):

so what should I do first

OpenStudy (espex):

How would you determine the total cost to make 2 copies, without counting the rental fee?

OpenStudy (anonymous):

divide

OpenStudy (espex):

Alright, divide what?

OpenStudy (anonymous):

the monthly charge with the cents per copy

OpenStudy (espex):

How are the two charges related? Does the monthly charge change if I make one copy or twenty copies?

OpenStudy (anonymous):

No it doesn't because it's the starting charge... I think

OpenStudy (espex):

Exactly. The only thing that will change how much I will pay is the number of copies I actually make.

OpenStudy (anonymous):

Ok so what I need to do is take 300/12 and 600/6 and I'll get my answer?

OpenStudy (espex):

Why are you dividing the rental fee again? If you are renting copiers from me, I am going to take that 300 dollars and put it in my pocket, PLUS $0.12 PER copy that you make. So if you make 0 copies, I get $300, if you make 1 copy, I get $300.12.

OpenStudy (anonymous):

Aw ok I see where that happens so all I do multiply or add it seems to me like I add

OpenStudy (espex):

Write out the equation to calculate the total charge for 5 copies then.

OpenStudy (anonymous):

So we have 0 copies= 300, 1 copy= 300.12, 2 copies=300.24 am I right so far

OpenStudy (espex):

Yes you are. Can you write an expression to represent what you're doing? What if you had to calculate 1000 copies.

OpenStudy (anonymous):

I know that 1000 is x so we need to find y but I get confused when I have to find it because I don't know all the steps

OpenStudy (anonymous):

or is1000 the y

OpenStudy (espex):

There is no 'y' in this problem. We will be using 'x', but not just yet.

OpenStudy (anonymous):

ok when

OpenStudy (espex):

If you can visualize there being a variable here then you should be able to write an expression like we did earlier, only with the added information for the operation on the copies you were just doing.

OpenStudy (anonymous):

I can't visualize it well I can I just don't know if I'm doing it right

OpenStudy (espex):

Write it out and I will tell you if you are.

OpenStudy (anonymous):

Hmm so would it be 12+300x=1000

OpenStudy (espex):

You have it multiplying your rental fee, why wouldn't you multiply your copy charge?

OpenStudy (anonymous):

I got confused

OpenStudy (anonymous):

so it would be 300+12x=1000

OpenStudy (espex):

The 1000, in this example, is what you would put in place of your 'x'. You would have to calculate the equation to get what it equals.

OpenStudy (anonymous):

Ok so 1000 is the x no y value so now what I do is find what equals the x

OpenStudy (espex):

In this example the 1000 IS your 'x'. So you do not need to see how much it is.

OpenStudy (anonymous):

right ok man this is confusing

OpenStudy (espex):

If you went to a carnival and played the game where you throw balls at the plates, and the guy says that you get 3 balls for a dollar. How much would it cost you to throw 3 balls?

OpenStudy (anonymous):

a dollar

OpenStudy (anonymous):

is that right

OpenStudy (espex):

Yes it is. What if you wanted to throw 6 balls?

OpenStudy (anonymous):

18 right

OpenStudy (anonymous):

cause 3x6=18

OpenStudy (espex):

Sorry, my system became unstable... And no, you get 3 for $1, so for every $1 you are handed 3 balls. Now, if you wanted to throw 6 balls, how much would it cost?

OpenStudy (anonymous):

it would be 2 dollars

OpenStudy (espex):

Right, now you can think about the 3 balls as a "set". So you get 1 "set" for 1 dollar, you get 2 "sets" (6 balls) for 2 dollars, what if you wanted to throw 3 "sets"?

OpenStudy (anonymous):

9 dollars

OpenStudy (espex):

If you get 1 set for a dollar, how much is 3 sets?

OpenStudy (anonymous):

aw apologies 3dollars

OpenStudy (espex):

Exactly

OpenStudy (espex):

So how are you getting the cost? What if I asked you how much it would be to throw 10 sets?

OpenStudy (anonymous):

so 30

OpenStudy (espex):

If you get 1set for $1, 10 sets is ?

OpenStudy (espex):

I feel I need to point out that if you are having difficulty with this concept, the geometry you referenced earlier will be very difficult.

OpenStudy (anonymous):

Yes it is

OpenStudy (anonymous):

I'm trying to count by 3 but I guess that's wrong

OpenStudy (espex):

You need to count by the number it costs you each time. You only care about what is changing, each set you get will always have 3 balls. However you are changing the number of sets you get, which has a charge associated with each.

OpenStudy (espex):

If I punch you in the arm twice, each time you flinch, and you flinch three times, I get to punch you twice for each one, so 2(punches) multiplied by 3(flinches) means that I get to punch you 6 times.

OpenStudy (espex):

If I am going to give you 7 cents every time I step on a crack in the side walk, the amount I pay for each crack doesn't change, the number of cracks I step on does. So if I were to step on 0 cracks, you get 7cents times 0, if I stepped on 12 cracks, you get 7 cents times 12.

OpenStudy (anonymous):

aw that makes sense

OpenStudy (espex):

Well let's see if it does.. :) If I charge you 12 cents for every copy you make, how much will it cost you to make 4 copies?

OpenStudy (espex):

Think about what is changing and what stays the same.

OpenStudy (anonymous):

is it 48 dollars

OpenStudy (anonymous):

or 12+4=18 dollars

OpenStudy (espex):

Well your first answer was basically correct, although it is cents and not dollars. Your second answer is not right in any way.

OpenStudy (anonymous):

ok so its 48 cents got it

OpenStudy (espex):

Now how did you get that?

OpenStudy (anonymous):

I multiplied 12 times 4

OpenStudy (espex):

Excellent, that is great. Okay, so what if you made 6 copies?

OpenStudy (anonymous):

is it 72

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Latest Questions
RAVEN69: My drawing so far is actually fire
1 week ago 9 Replies 2 Medals
PureSoulless: is staying at your friend's house while you're homeless legal.
2 weeks ago 5 Replies 1 Medal
whyjustwhy: i did that one TV girl trend with blake (aka @ShadowKid3)
1 week ago 12 Replies 2 Medals
whyjustwhy: i did that one TV girl trend with blake (aka @shadowkid3)
2 weeks ago 3 Replies 0 Medals
whyjustwhy: yo guys he can watch me sleep now (ignore dora)
3 weeks ago 24 Replies 1 Medal
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!