Hey Guys, check out this pretty neat site for more practice on the qr problems..

[Speeddater]

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How's the studying going guys? I stumbled upon a cool site that should help all of us with these freakin word problems. Its so obvious, I can't believe I overlooked it at first. Type in SAT word problems and you can watch interactive videos of teachers showing you tricks to the word problems. It feels as though you're in a kaplan class, heh. Anyway, here's one problem, the instructor didn't provide the answer, any math kings / queens want to take a shot at this? Streetwolf, this problem has your name on it 🙂.

http://youtube.com/watch?v=XPYwafRBdmw&mode=related&search= -
This is the site where a very wordy problem is presented, but no answer is given.


Here is the site to practice more word problems.

Vcuchic, are you reading this 🙂 Santa came early this hear

Good luck studying

 

[vcuchic]

haha 🙂

but this site only gives the question
did i just completely overlook the answer/explanation part?

 

[Streetwolf]

I get C.

 

[saaz55]

i get c too. i dont mind these too much. its the trig functions that suck. ill show you how to do it in case people are getting stuck (this is according to my answer):

Know:
$5.55 call = 555 cents
comp. charges x cents for first minute: x = we can assume is $5 = 500 cents
comp. charges y cents for each minute afterwards: y = we assume is 5 cents

Want to Know:
How many minutes was the call according to this plan?

555 cents - 500 initial charge - 5*m per minute = 0
where m = per minute
therefore, we can calculate that the totale number of minutes is 12.

ultimately, we will plug and chug to find an expression that equals to 12. and according to my math, that should be c.

I hoped this helped for anyone who didnt get it

 

[Streetwolf]

Okay here's the general solution.

You have a $5.55 call but the rates are in cents. So we have a 555 cent call. The first minute costs x cents. We know it's more than a one minute call. So the cost of the call after the first minute is (555 - x) cents. Since each of those minutes costs the same (y cents per minute), we know there are (555 - x) / y minutes after the first minute.

That's choice A.

It is NOT the answer.

We need to include the first minute.

So we have 1 + (555 - x)/y which is the total amount of calling time. Since that isn't an answer, we instead write y/y + (555 - x)/y = (y + 555 - x)/y = (555 - x + y)/y.

That's choice C.

 

[levyusupov]

watch the video till the end and u will get an option to see the solution in the RELATED part.
ad yes, the answer is C !

 

[Speeddater]

watch the video till the end and u will get an option to see the solution in the RELATED part.
ad yes, the answer is C !

Thanks a lot guys. I got C as well. I was just tired last night and it seems so obvious once you notice you made a careless mistake. That's my only roadblock in math, & even the sciences too. Thanks again. Hope you guys are doing great studying at your end.