onmywaytoboston wrote:
MikeyMark wrote:
Hello
I am having a bit of trouble understanding the wording of this question and I'm hoping one of you can help.
I understand how to add up the quantities and get 24.5. No problem there. My query is why is it 24.5a? If a=$4.00 then this doesn't make sense to me. Are we really just substituting the letter "a" for the "$" sign? I thought when the question asked for the cost in terms of "a", it wanted to know how many "a's", would it take to make something of the same cost i.e. $24.50. (answer being. 24.5/4, which is not in the answer choices)
Thanks in advance
Mike
I have this same question! Can someone respond please?
Hi
MikeyMark &
onmywaytoboston ,
I'll try to explain. The problem at hand is an average problem. Seller wants to make his/her job easier by reducing the quantities to an average so that the total price could be calculated depending on quantity of Almond bought.
It becomes a lot clearer if we use units with the variables.
Lets say, Quantity of cashews bought is c lbs , Almonds be a lbs and Walnuts be w lbs respectively.
So, to answer you question whether we could just substitute the letter "a" for the "$" sign?
No.
But we can substitute "a" with "a lbs of Almond".
Application?
Say you have 50$ and you want to buy nut mix. How would seller calculate how much of each type of nuts should he/she use?
24.5 * a = 50
a = 2.04 lbs of almond
Since we are given conditions to calculate quantities for cashews and Walnut, we use them as following.
c = 2a = 2 * 2.04 = 2.08 lbs of cashews
w = 3a = 3 * 2.04 = 6.12 lbs of walnuts
Hope that helps.
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