Julio takes his brother to a music store to buy cds. Together they have $50 to spend on cds. The music store sells CDs for $15 each. Write a equation for the amount of money, y, Julio and his brother will have left over after purchasing x amount of CDs.

Question

anonymous · Answer

ok if they are selling cds for 15$ a piece then you have to divide 15 into 50 to see how many you are going to have. can you do that for me?

anonymous · Answer

i think it goes in 4 times right?

anonymous · Answer

oh wait 3

anonymous · Answer

gooood, that's better

anonymous · Answer

ok so we know that our money will only go so far as 3*15. we will make 15 the x so we can buy 3x =y cds. how much will you have left over after 3x?

anonymous · Answer

5?

anonymous · Answer

very good!   so your equation is y=3x and your leftover is 5. good job!

anonymous · Answer

thanks:)

anonymous · Answer

who hold on

anonymous · Answer

i read that question wrong.   this is qwriting an equation for hte amount of money you will have left over?

anonymous · Answer

oh yeah

anonymous · Answer

the anwsers on my paper look ike this; y=15x + 50

anonymous · Answer

ok i'm so sorry...it would be 50 - 3x = y.....the money you start with minus the cost of cd is what you have left over.

anonymous · Answer

hmmm.....that would mean x would have to = -3 to have 5 $ left.....if that's what it says on yoru paper i would go with it.....but that just doesn't seem right to me

anonymous · Answer

A. y=50-15
B. Y=15x +50
C.y= 50x +15
D. y =-15x
it could be any of these

anonymous · Answer

the way i read this it would be y = 50-15x........ but of course that isn't in your list......the only one that would make sense would be B because D doesn't tell how much your have left plus it will be negative.

anonymous · Answer

sorry A. is supposed to have a x at the end of the 15, so does that make A. the answer?

anonymous · Answer

yep!!! y = 50-15x

anonymous · Answer

awesome thank you