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You can buy DVDs at a local store fro $15.49 each. You can buy them at an online sore for $13.99 each plus $6 for shipping. How many DVDs can you buy for the same amount at the two stores?
 one year ago
 one year ago
You can buy DVDs at a local store fro $15.49 each. You can buy them at an online sore for $13.99 each plus $6 for shipping. How many DVDs can you buy for the same amount at the two stores?
 one year ago
 one year ago

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tjones89Best ResponseYou've already chosen the best response.2
for this problem you need to create two equations; one that represents the amount of money it would cost to buy a certain amount of movies from the store, and another that shows the money it costs to buy a certain amount of movies online.
 one year ago

WhiteRabbitBest ResponseYou've already chosen the best response.0
d = 15.49 and o = 13.99 + 6?
 one year ago

tjones89Best ResponseYou've already chosen the best response.2
what you need in those equations is a variable to represent the number of movies
 one year ago

tjones89Best ResponseYou've already chosen the best response.2
because if I buy 2 movies from the store it will be 2 * $15.49
 one year ago

tjones89Best ResponseYou've already chosen the best response.2
so lets let x = the number of movies I want to buy and y is the amount of money it costs
 one year ago

tjones89Best ResponseYou've already chosen the best response.2
if I buy from the store I multiply the number of movies I want to buy times the price of each movie right?
 one year ago

tjones89Best ResponseYou've already chosen the best response.2
that works too. m for movies and c for cash?
 one year ago

tjones89Best ResponseYou've already chosen the best response.2
so the way we can represent the price of movies at the local store is with 15.49m = c
 one year ago

tjones89Best ResponseYou've already chosen the best response.2
now we can make another equation that shows the price of buying movies online. Can you make that one?
 one year ago

tjones89Best ResponseYou've already chosen the best response.2
so now the problem asks us how many movies we can buy with the same amount of money at the two stores or for what value of m will both of our equations result in the same number c
 one year ago

WhiteRabbitBest ResponseYou've already chosen the best response.0
hmm can we combine them?
 one year ago

tjones89Best ResponseYou've already chosen the best response.2
and since 13.99m + 6 = c and 15.49m = c we can set these equations equal to each other because we're assuming c is the same number in both
 one year ago

tjones89Best ResponseYou've already chosen the best response.2
its like saying 2+2 = 4 and 1 +3 =4 so we can say that 1 + 3 = 2 + 2
 one year ago

WhiteRabbitBest ResponseYou've already chosen the best response.0
oh ota, so 15.49m = 13.99m + 6
 one year ago

tjones89Best ResponseYou've already chosen the best response.2
can you solve from here?
 one year ago

tjones89Best ResponseYou've already chosen the best response.2
let me know what you get
 one year ago

tjones89Best ResponseYou've already chosen the best response.2
the question didnt ask for that, but yeah good job!
 one year ago

WhiteRabbitBest ResponseYou've already chosen the best response.0
it bothers me if i don't solve for all variables ... sorry
 one year ago
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