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raimelgarcia5
Group Title
 Students in class are exchanging pencils.
1 student = 0 exchanges
2 students = 2 exchanges
3 students = 6 exchanges
4 students = 12 exchanges
how many exhcanges for 7 sutudents?
*I know the answer to be: 42 exchanges... but how to get it??? I knwo there is a formula, but I dont knwo how is it and how to use it..* help
 one year ago
 one year ago
raimelgarcia5 Group Title
 Students in class are exchanging pencils. 1 student = 0 exchanges 2 students = 2 exchanges 3 students = 6 exchanges 4 students = 12 exchanges how many exhcanges for 7 sutudents? *I know the answer to be: 42 exchanges... but how to get it??? I knwo there is a formula, but I dont knwo how is it and how to use it..* help
 one year ago
 one year ago

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ParthKohli Group TitleBest ResponseYou've already chosen the best response.1
1 * 0 = 0 2 * 1 = 2 3 * 2 = 6 4 * 3 = 12 5 * 4 = 20 6 * 5 = 30 7 * 6 = 42
 one year ago

raimelgarcia5 Group TitleBest ResponseYou've already chosen the best response.0
yes, thats how i got it... but i know there is a formula... something like an=2n1+(n1) or something like that... (not sure if its that one.... and i know how to use that formula... nor i dont kknow what the formula menas.. :/
 one year ago

Opcode Group TitleBest ResponseYou've already chosen the best response.2
Okay. Math in the morning ^_^. There's a pattern. 1 student = 0 exchanges 2 students = 2 exchanges 3 students = 6 exchanges 4 students = 12 exchanges S students = X exchanges S students = X exchanges 7 students = 42 exchanges S = Students X = Exchanges The pattern is how many number of students there is minus one from it then times it by that number. So: S  1 = Number to multiple by let's call it (N). S * N = X Let's test it: First say there are 10 students. 10  1 = 9 10 * 9 = 90 Exchanges. Get it?
 one year ago

raimelgarcia5 Group TitleBest ResponseYou've already chosen the best response.0
but why S1???
 one year ago

ParthKohli Group TitleBest ResponseYou've already chosen the best response.1
Nobody knows...
 one year ago

Opcode Group TitleBest ResponseYou've already chosen the best response.2
Because. The pattern shows that the number multiplied by the students is always one less than it.
 one year ago

raimelgarcia5 Group TitleBest ResponseYou've already chosen the best response.0
still dont get it.. (sorry for the persistance..) i wanna learn math like for real..
 one year ago

Opcode Group TitleBest ResponseYou've already chosen the best response.2
So the formula is: (S  1) = N S * N = X S = Students X = Exchanges N = Number to multiple on "S".
 one year ago

Opcode Group TitleBest ResponseYou've already chosen the best response.2
Say there is: 120 students = ? exchanges Now use the formula: (S  1) = N S = 120 So (120  1) = 119 N = 119 Now for step two: S * N = X We know what S and N are now so plug in the values: 120 * 119 = 14,280 14,280 = X And again: S = Students X = Exchanges N = Number to multiple on "S".
 one year ago

raimelgarcia5 Group TitleBest ResponseYou've already chosen the best response.0
yeah.. i get that... i just didnt know why N = S1 ... but its ok tho... thanks man! :)
 one year ago

raimelgarcia5 Group TitleBest ResponseYou've already chosen the best response.0
u are a really good helper : )
 one year ago

Opcode Group TitleBest ResponseYou've already chosen the best response.2
So the formula is: (S  1) = N < S is for Students (Given) N is for the Number to multiple on "S". IN the pattern to get N. In this case we minus by "1". Then leading us to: S * N = X S = Students X = Exchanges N = Number to multiple on "S". And no problem ^_^.
 one year ago

ParthKohli Group TitleBest ResponseYou've already chosen the best response.1
I am waiting to help like Opcode. :(
 one year ago

Opcode Group TitleBest ResponseYou've already chosen the best response.2
Help me with what O.o? My stuff is just memorizing things like postulates and theorems. Memory with numbers = Head Ache. (For me at lest).
 one year ago

raimelgarcia5 Group TitleBest ResponseYou've already chosen the best response.0
ahah...
 one year ago
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