PLZ HELP!!! WILL WIN BRAINLIEST!! Describe an everyday situation that involves dividing a mixed number by a fraction.

Mathematics

1 answer:

Leno4ka [110]4 years ago

5 0

Answer:

If you are reading a recipe and have to find out what the appropriate amount of something is.

Step-by-step explanation:

I have a Recipe that calls for 1 cup of uncooked rice. Rice expands 3 fold during cooking. I have 2 1/2 cups of cooked rice. How much uncooked rice to I need to add to get the appropriate amount.

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Please help math

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$\displaystyle\\
15(2a - 2) = 5(a^2 -1) \\ \\ 
30a - 30 = 5a^2-5\\\\
-5a^2 + 30a -30 + 5 =0\\\\
-5a^2 + 30a -25 =0 ~~~~~\Big| \times (-1) \\\\
5a^2 - 30a +25 = 0~~~~~\Big| : 5 \\\\
a^2 - 6a +5 = 0 \\ \\ 
a_{12}= \frac{-b\pm \sqrt{b^2-4ac}}{2a}= \frac{6\pm \sqrt{36-20}}{2}= \frac{6\pm \sqrt{16}}{2}=\frac{6\pm 4}{2}= \boxed{3\pm 2} \\ \\ 
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