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Vanyuwa [196]
3 years ago
15

Which equation is not equivalent to the formula m = ca?

Mathematics
1 answer:
kherson [118]3 years ago
3 0

\displaystyle\\ m = c \times a\\\\ \Longrightarrow \begin{cases} c = \dfrac{m}{a} \\\\ a = \dfrac{m}{c} \\\\ m = a\times c  \end{cases}\\\\ \Longrightarrow\text{Equation}\text{\bf "a equals c over m"}\text { is NOT equivalent to the formula m = ca}

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Answer:

We have 28 bags of butter cookies and 12 bags of chocolate chip cookies

Step-by-step explanation:

Let b be the number of butter cookies and c the number of chocolate chips.

Since we have them in the ratio 7:3, b/c = 7/3   (1)

Also, when Mrs Benjamin gives away 24 butter cookies, the ratio becomes 11:6. So, the remaining number of butter cookies are b - 24. So, the ratio of remaining butter cookies to chocolate chips is (b - 24)/c = 11/6   (2)

From (1) b = 7c/3 and from (2) 6(b - 24)  = 11c  ⇒  6b - 144 = 11c  (3)

Substituting b into (3), we have

6b - 144 = 11c

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14c - 144 = 11c

subtracting 11c from both sides, we have

14c - 11c - 144 = 11c - 11c

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adding 144 to both sides, we have

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number of bags of chocolate chip cookies = c/4 = 48/4 = 12 bags of chocolate chip cookies

<u>So, we have 28 bags of butter cookies and 12 bags of chocolate chip cookies</u>

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2 years ago
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