Question

Tom has a collection of 30 CDs and Nita has a collection of 18 CDs. Tom is adding 1 CD a month to his collection while Nita is adding 5 CDs a month to her collection. Find the number of months after which they will have the same number of CDs.
A. 1 month
B. 3 months
C. 2 months
D. 33 months

Answer 1

C!? Its right. right?
@BacardiDavis

Answer 2

u understand how to build equations right

Answer 3

ehhh kinda lol

Answer 4

want me to teach u that

Answer 5

It's D

Answer 6

yes! that would be aewsome (^.^)

Answer 7

lol trumpter

Answer 8

I MEAN B MAH BAD

Answer 9

ok lets start

Answer 10

3 months not 33 read it wrong.

Answer 11

lol i was lik o.0

Answer 12

It's 100% 3 months

Answer 13

thanks @trumpetmaster7777

Answer 14

so we got 1 guy starting with
30 CDs ---> this guys CDS going up 1 every month, so in N months he will have N CDS more
and
18 CDS ---> this guys CDS going up 5 every Month, so in N months he will have 5 * N CDS

Answer 15

np

Answer 16

can u write those 2 equatiosn for me

Answer 17

equation for the first guy and the 2nd guy separetly

Answer 18

i suck at math (/./)

Answer 19

okay just read those statements then, do the statements make sense

Answer 20

Yes, like i get it :P

Answer 21

ok, dont worry this is very simple, u dont suck at math trust me :)

Answer 22

1x + 30 =
5x + 18 =

Answer 23

stop trumptet

Answer 24

he need to understand how to build up his own equation

Answer 25

alright, sorry :(

Answer 26

lets look at the first guy!
lets make an equation for him
Let Y = the number of CDs he has
Let X = number of months
Y = some function of X

Answer 27

read this tell me if its making sense

Answer 28

y=cds
x=months
Y???

Answer 29

something not make sense?

Answer 30

What is the Y for? ohhhh pshhhh CD's??? Y=number of cd's as well?

Answer 31

first we defined what our variables are now, now we need to find the equation

Answer 32

when i say Y is a function of X im plain english iam saying, Y is changing as X is changing, i want to know what Y is for a certain change of X, we need to write an equation for that

Answer 33

ohh o.0

Answer 34

okay lets start working on equation >_>

Answer 35

look at the initial condition,
we know that at the start he has 30 CDS, so even before any time passes he has 30 CDS
lets add this to our equation
Y=30
now we know when X is changing he get 1 CD for every change in X
so for 1 month he has 1 CD more,
for 2 months he has 1 * 2 more CDs,
for 3 months he has 1*3 CD
for X months he has 1*X CD more
Y=30+(1*X)
Y=30+X
one times x is just x

Answer 36

make sense?

Answer 37

yes! thanx so much!

Answer 38

about time, lol

Answer 39

okay can you make the equation for the other guy now :)

Answer 40

lol ikr!

Answer 41

this isnt so simple to get at first, u are doing a very good job understanding :)