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Yuki888 [10]
3 years ago
7

20 pts and a mark!!! A store is having a sale on jelly beans and trail mix. For 6 pounds of jelly beans and 2 pounds of trail mi

x, the total cost is $ 12 . For 3 pounds of jelly beans and 5 pounds of trail mix, the total cost is $ 15 . Find the cost for each pound of jelly beans and each pound of trail mix.
Mathematics
1 answer:
marysya [2.9K]3 years ago
5 0

Answer:

The cost of Jelly Beans = $ \frac{5}{4} $

The cost of Trail Mix      = $ \frac{9}{4} $

Step-by-step explanation:

Given the cost of 6 pounds of Jelly Beans and 2 pounds of trail mix is $12.

Also, the cost of 3 pounds of Jelly Beans and 5 pounds of Trail mix is $15.

Call the cost of one pound of Jelly beans as J

And cost of one pound of Trail Mix as T.

Now, converting the given data to mathematical form, we would have:

$ 6J + 2T = 12  $

Dividing through out by 2 we have:

$ 3J + T = 6 \hspace{15mm}  .....(1) $

$ 3J + 5T = 15 \hspace{15mm} ....(2) $

To solve (1) and (2), subtract the two equations which will give us:

$ -4T = - 9 $

⇒                                            T = 9/4

Substituting the value of T in (1), we have:

$ 3J = 6 - \frac{9}{4} $

$ \implies 3J = \frac{24 - 9}{4} = \frac{(3)(8 - 3)}{4} = \frac{5}{4} $

∴                                               J  = 5/4

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